Ensure that png_row is NULL

If we fail early, the call to free(png_row) could crash because
of an uninitialized (non-NULL) png_row.

1 files changed, 1 insertions, 1 deletions

diff --git a/if2png.c b/if2png.c
index 030e9ad..a27b4bc 100644
--- a/if2png.c
+++ b/if2png.c
@@ -25,7 +25,7 @@ main(int argc, char *argv[])
 {
 	png_structp png_struct_p;
 	png_infop png_info_p;
-	uint8_t hdr[17], *png_row;
+	uint8_t hdr[17], *png_row = NULL;
 	png_uint_32 width, height, i;
 	png_size_t png_row_len;