fix gib_imlib_save_image_with_error_return in imported giblib code

1 files changed, 16 insertions, 7 deletions

diff --git a/src/gib_imlib.c b/src/gib_imlib.c
index b53b1cc..8f401aa 100644
--- a/src/gib_imlib.c
+++ b/src/gib_imlib.c
@@ -527,13 +527,22 @@ void
 gib_imlib_save_image_with_error_return(Imlib_Image im, char *file,
                                        Imlib_Load_Error * error_return)
 {
-   char *tmp;
-
-   imlib_context_set_image(im);
-   tmp = strrchr(file, '.');
-   if (tmp)
-      imlib_image_set_format(tmp + 1);
-   imlib_save_image_with_error_return(file, error_return);
+    char *tmp;
+
+    imlib_context_set_image(im);
+    tmp = strrchr(file, '.');
+    if (tmp) {
+        char *p, *pp;
+        p = estrdup(tmp + 1);
+        pp = p;
+        while(*pp) {
+            *pp = tolower(*pp);
+            pp++;
+        }
+        imlib_image_set_format(p);
+        free(p);
+    }
+    imlib_save_image_with_error_return(file, error_return);
 }
 
 void