- minor fix, use unsigned int

src/tagrules/check_tag_has_value_matching_regex.c

@@ -19,7 +19,7 @@ ret_t check_tag_has_value_matching_regex(ctiff_t * ctif, tag_t tag, const char *
     case TIFF_ASCII: {
                        char * val=NULL;
                        uint32 count=0;
-                       int r = 0;
+                       unsigned int r = 0;
                        ret = TIFFGetFieldASCII(ctif, tag, &val, &count);
                        if (ret.returncode != is_valid) return ret;
                        if (0 < count) {