[easytag] Use et_str_empty() instead of strlen() in search

[David King <davidk src gnome org>]

commit 2e77643a70ef2f9a9bce83867c963aac1b54c65e
Author: David King <amigadave amigadave com>
Date:   Fri Mar 27 18:08:03 2015 +0100

    Use et_str_empty() instead of strlen() in search

 src/search_dialog.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/src/search_dialog.c b/src/search_dialog.c
index 0c551ad..f0af0b4 100644
--- a/src/search_dialog.c
+++ b/src/search_dialog.c
@@ -256,7 +256,9 @@ Add_Row_To_Search_Result_List (EtSearchDialog *self,
     {
         if (case_sensitive)
         {
-            if ( SearchResultList_Text[column] && strlen(string_to_search) && 
strstr(SearchResultList_Text[column],string_to_search) )
+            if (SearchResultList_Text[column]
+                && !et_str_empty (string_to_search)
+                && strstr (SearchResultList_Text[column], string_to_search))
             {
                 if (g_settings_get_boolean (MainSettings, "file-changed-bold"))
                 {
@@ -282,7 +284,8 @@ Add_Row_To_Search_Result_List (EtSearchDialog *self,
 
             list_text = g_utf8_casefold(SearchResultList_Text[column], -1);
 
-            if ( list_text && strlen(string_to_search2) && strstr(list_text,string_to_search2) )
+            if (list_text && !et_str_empty (string_to_search2)
+                && strstr (list_text, string_to_search2))
             {
                 if (g_settings_get_boolean (MainSettings, "file-changed-bold"))
                 {