Fix overflow checks

We check for the proper sizeofs, cf.
<https://github.com/libgd/libgd/commit/c3cf674c>.

1 files changed, 3 insertions, 7 deletions

diff --git a/ext/gd/libgd/gd.c b/ext/gd/libgd/gd.c
index 464f8d5b7a..508d66fc74 100644
--- a/ext/gd/libgd/gd.c
+++ b/ext/gd/libgd/gd.c
@@ -125,12 +125,10 @@ gdImagePtr gdImageCreate (int sx, int sy)
 	if (overflow2(sx, sy)) {
 		return NULL;
 	}
-
 	if (overflow2(sizeof(unsigned char *), sy)) {
 		return NULL;
 	}
-
-	if (overflow2(sizeof(unsigned char *), sx)) {
+	if (overflow2(sizeof(unsigned char), sx)) {
 		return NULL;
 	}
 
@@ -181,12 +179,10 @@ gdImagePtr gdImageCreateTrueColor (int sx, int sy)
 	if (overflow2(sx, sy)) {
 		return NULL;
 	}
-
-	if (overflow2(sizeof(unsigned char *), sy)) {
+	if (overflow2(sizeof(int *), sy)) {
 		return NULL;
 	}
-
-	if (overflow2(sizeof(int *), sx)) {
+	if (overflow2(sizeof(int), sx)) {
 		return NULL;
 	}