Merge branch 'patch-1' of https://github.com/GMacharadze/stb into work2

stb_image.h

@@ -6649,7 +6649,15 @@ static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y,
             stride = g.w * g.h * 4; 
          
             if (out) {
-               out = (stbi_uc*) STBI_REALLOC( out, layers * stride ); 
+               void *tmp = (stbi_uc*) STBI_REALLOC( out, layers * stride );
+               if (NULL == tmp) {
+                  STBI_FREE(g.out);
+                  STBI_FREE(g.history);
+                  STBI_FREE(g.background);
+                  return stbi__errpuc("outofmem", "Out of memory");
+               }
+               else
+                  out = tmp;
                if (delays) {
                   *delays = (int*) STBI_REALLOC( *delays, sizeof(int) * layers ); 
                }