1 files changed, 3 insertions, 3 deletions
diff --git a/src/png.c b/src/png.c
index 0a89c15..350f960 100644
--- a/src/png.c
+++ b/src/png.c
@@ -47,12 +47,12 @@ int png_load(char *name, struct splash *image, unsigned char **alpha)
 	char id[4];
 
 	fh = fopen(name,"rb");
-	if (fh == -1)
+	if (fh == NULL)
 		return -ENOENT;
 
-	fread(&id, 1, 4, fh);
+	ret = fread(&id, 1, 4, fh);
 
-	if (!(id[1] == 'P' && id[2]=='N' && id[3]=='G'))
+	if (ret != 4 || !(id[1] == 'P' && id[2]=='N' && id[3]=='G'))
 		return -EINVAL;
 
 	rewind(fh);