tidy-up: make conditional checks more consistent

... remove '== NULL' and '!= 0'

Closes #6912

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/md4.c b/lib/md4.c
index e731e123d..c651ddf66 100644
--- a/lib/md4.c
+++ b/lib/md4.c
@@ -174,7 +174,7 @@ static void MD4_Init(MD4_CTX *ctx)
 
 static void MD4_Update(MD4_CTX *ctx, const void *data, unsigned long size)
 {
-  if(ctx->data == NULL) {
+  if(!ctx->data) {
     ctx->data = malloc(size);
     if(ctx->data != NULL) {
       memcpy(ctx->data, data, size);