gzip: Use calloc in initcompress() and initdecompress()

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>

src/gzip.c

@@ -39,11 +39,10 @@ static z_stream *initcompress(ssh_session session, int level) {
   z_stream *stream = NULL;
   int status;
 
-  stream = malloc(sizeof(z_stream));
+  stream = calloc(1, sizeof(z_stream));
   if (stream == NULL) {
     return NULL;
   }
-  memset(stream, 0, sizeof(z_stream));
 
   status = deflateInit(stream, level);
   if (status != Z_OK) {
@@ -128,11 +127,10 @@ static z_stream *initdecompress(ssh_session session) {
   z_stream *stream = NULL;
   int status;
 
-  stream = malloc(sizeof(z_stream));
+  stream = calloc(1, sizeof(z_stream));
   if (stream == NULL) {
     return NULL;
   }
-  memset(stream,0,sizeof(z_stream));
 
   status = inflateInit(stream);
   if (status != Z_OK) {