[gimp] Syncing TinyScheme with the 1.42 version in the SourceForge repository.

[Kevin Cozens <kcozens src gnome org>]

commit 511ada844e23f5395b3f6abb61ab43cd5987741f
Author: Kevin Cozens <kevin ve3syb ca>
Date:   Thu Aug 6 11:55:19 2020 -0400

    Syncing TinyScheme with the 1.42 version in the SourceForge repository.
    
    This picks up changes applied in SVN revisions 120 and 124 which
    both clean up compiler warnings.

 plug-ins/script-fu/tinyscheme/dynload.c | 4 ++++
 plug-ins/script-fu/tinyscheme/scheme.c  | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/plug-ins/script-fu/tinyscheme/dynload.c b/plug-ins/script-fu/tinyscheme/dynload.c
index 6440a13cc6..6084a40547 100644
--- a/plug-ins/script-fu/tinyscheme/dynload.c
+++ b/plug-ins/script-fu/tinyscheme/dynload.c
@@ -21,6 +21,10 @@ static void make_init_fn(const char *name, char *init_fn);
 #else
 typedef void *HMODULE;
 typedef void (*FARPROC)();
+#ifndef SUN_DL
+#define SUN_DL
+#endif
+#include <dlfcn.h>
 #endif
 
 #ifdef _WIN32
diff --git a/plug-ins/script-fu/tinyscheme/scheme.c b/plug-ins/script-fu/tinyscheme/scheme.c
index eee98da566..845dadf836 100644
--- a/plug-ins/script-fu/tinyscheme/scheme.c
+++ b/plug-ins/script-fu/tinyscheme/scheme.c
@@ -5289,7 +5289,7 @@ int MacTS_main(int argc, char **argv) {
 int main(int argc, char **argv) {
 #endif
   scheme sc;
-  FILE *fin;
+  FILE *fin = NULL;
   char *file_name=InitFile;
   int retcode;
   int isfile=1;