review: macro hygene

Author: ndossche

ext/exif/exif.c

@@ -4313,14 +4313,14 @@ static void exif_isobmff_parse_meta(unsigned char *data, unsigned char *end, iso
 
 	size_t remain;
 #define CHECK(n) do { \
-	if (remain < n) { \
+	if (remain < (n)) { \
 		return; \
 	} \
 } while (0)
 #define ADVANCE(n) do { \
 	CHECK(n); \
-	remain -= n; \
-	p += n; \
+	remain -= (n); \
+	p += (n); \
 } while (0)
 
 	unsigned char *box_offset = data + 4;