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-rw-r--r--src/Fl_Image_Surface.cxx2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/Fl_Image_Surface.cxx b/src/Fl_Image_Surface.cxx
index 747b051af..eaa5cc975 100644
--- a/src/Fl_Image_Surface.cxx
+++ b/src/Fl_Image_Surface.cxx
@@ -240,7 +240,7 @@ static int find_slot() { // return an available slot to memorize an Fl_Image_Sur
for (int num = 0; num < count; num++) {
if (!offscreen_api_surface[num]) return num;
}
- if (count >= sizeof(offscreen_api_surface)/sizeof(Fl_Image_Surface*)) return -1;
+ if ((unsigned)count >= sizeof(offscreen_api_surface)/sizeof(Fl_Image_Surface*)) return -1;
return count++;
}