[libxml2] Fix warnings when compiling without reader or push parser

[Nick Wellnhofer <nwellnhof src gnome org>]

commit dbc6b55b59d67485e5ccb39079d5c7412796ec76
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Thu May 16 21:06:56 2019 +0200

    Fix warnings when compiling without reader or push parser

 HTMLparser.c |  2 ++
 xmllint.c    | 36 ++++++++++++++++--------------------
 2 files changed, 18 insertions(+), 20 deletions(-)
---
diff --git a/HTMLparser.c b/HTMLparser.c
index 9e60e27e..6871f224 100644
--- a/HTMLparser.c
+++ b/HTMLparser.c
@@ -2176,6 +2176,7 @@ htmlEncodeEntities(unsigned char* out, int *outlen,
  *                                                                     *
  ************************************************************************/
 
+#ifdef LIBXML_PUSH_ENABLED
 /**
  * htmlNewInputStream:
  * @ctxt:  an HTML parser context
@@ -2207,6 +2208,7 @@ htmlNewInputStream(htmlParserCtxtPtr ctxt) {
     input->length = 0;
     return(input);
 }
+#endif
 
 
 /************************************************************************
diff --git a/xmllint.c b/xmllint.c
index 67cec205..d84f084f 100644
--- a/xmllint.c
+++ b/xmllint.c
@@ -180,17 +180,17 @@ static int exc_canonical = 0;
 #ifdef LIBXML_READER_ENABLED
 static int stream = 0;
 static int walker = 0;
+#ifdef LIBXML_PATTERN_ENABLED
+static const char *pattern = NULL;
+static xmlPatternPtr patternc = NULL;
+static xmlStreamCtxtPtr patstream = NULL;
+#endif
 #endif /* LIBXML_READER_ENABLED */
 static int chkregister = 0;
 static int nbregister = 0;
 #ifdef LIBXML_SAX1_ENABLED
 static int sax1 = 0;
 #endif /* LIBXML_SAX1_ENABLED */
-#ifdef LIBXML_PATTERN_ENABLED
-static const char *pattern = NULL;
-static xmlPatternPtr patternc = NULL;
-static xmlStreamCtxtPtr patstream = NULL;
-#endif
 #ifdef LIBXML_XPATH_ENABLED
 static const char *xpathquery = NULL;
 #endif
@@ -3058,10 +3058,10 @@ static void usage(FILE *f, const char *name) {
 #ifdef LIBXML_READER_ENABLED
     fprintf(f, "\t--stream : use the streaming interface to process very large files\n");
     fprintf(f, "\t--walker : create a reader and walk though the resulting doc\n");
-#endif /* LIBXML_READER_ENABLED */
 #ifdef LIBXML_PATTERN_ENABLED
     fprintf(f, "\t--pattern pattern_value : test the pattern support\n");
 #endif
+#endif /* LIBXML_READER_ENABLED */
     fprintf(f, "\t--chkregister : verify the node registration code\n");
 #ifdef LIBXML_SCHEMAS_ENABLED
     fprintf(f, "\t--relaxng schema : do RelaxNG validation against the schema\n");
@@ -3393,6 +3393,12 @@ main(int argc, char **argv) {
                 (!strcmp(argv[i], "--walker"))) {
             walker++;
              noout++;
+#ifdef LIBXML_PATTERN_ENABLED
+        } else if ((!strcmp(argv[i], "-pattern")) ||
+                   (!strcmp(argv[i], "--pattern"))) {
+           i++;
+           pattern = argv[i];
+#endif
        }
 #endif /* LIBXML_READER_ENABLED */
 #ifdef LIBXML_SAX1_ENABLED
@@ -3443,12 +3449,6 @@ main(int argc, char **argv) {
                    (!strcmp(argv[i], "--path"))) {
            i++;
            parsePath(BAD_CAST argv[i]);
-#ifdef LIBXML_PATTERN_ENABLED
-        } else if ((!strcmp(argv[i], "-pattern")) ||
-                   (!strcmp(argv[i], "--pattern"))) {
-           i++;
-           pattern = argv[i];
-#endif
 #ifdef LIBXML_XPATH_ENABLED
         } else if ((!strcmp(argv[i], "-xpath")) ||
                    (!strcmp(argv[i], "--xpath"))) {
@@ -3610,12 +3610,8 @@ main(int argc, char **argv) {
        }
     }
 #endif /* LIBXML_SCHEMAS_ENABLED */
-#ifdef LIBXML_PATTERN_ENABLED
-    if ((pattern != NULL)
-#ifdef LIBXML_READER_ENABLED
-        && (walker == 0)
-#endif
-       ) {
+#if defined(LIBXML_READER_ENABLED) && defined(LIBXML_PATTERN_ENABLED)
+    if ((pattern != NULL) && (walker == 0)) {
         patternc = xmlPatterncompile((const xmlChar *) pattern, NULL, 0, NULL);
        if (patternc == NULL) {
            xmlGenericError(xmlGenericErrorContext,
@@ -3624,7 +3620,7 @@ main(int argc, char **argv) {
            pattern = NULL;
        }
     }
-#endif /* LIBXML_PATTERN_ENABLED */
+#endif /* LIBXML_READER_ENABLED && LIBXML_PATTERN_ENABLED */
     for (i = 1; i < argc ; i++) {
        if ((!strcmp(argv[i], "-encode")) ||
                 (!strcmp(argv[i], "--encode"))) {
@@ -3678,7 +3674,7 @@ main(int argc, char **argv) {
            i++;
            continue;
         }
-#ifdef LIBXML_PATTERN_ENABLED
+#if defined(LIBXML_READER_ENABLED) && defined(LIBXML_PATTERN_ENABLED)
         if ((!strcmp(argv[i], "-pattern")) ||
            (!strcmp(argv[i], "--pattern"))) {
            i++;