@@ -194,8 +194,8 @@ static int init_pattern_from_file(AVFilterContext *ctx)

         life->h = h;

     }

-    if (!(life->buf[0] = av_mallocz(sizeof(char) * life->h * life->w)) ||

-        !(life->buf[1] = av_mallocz(sizeof(char) * life->h * life->w))) {

+    if (!(life->buf[0] = av_calloc(life->h * life->w, sizeof(*life->buf[0]))) ||

+        !(life->buf[1] = av_calloc(life->h * life->w, sizeof(*life->buf[1])))) {

         av_free(life->buf[0]);

         av_free(life->buf[1]);

         return AVERROR(ENOMEM);

@@ -236,8 +236,8 @@ static int init(AVFilterContext *ctx)

         /* fill the grid randomly */

         int i;

-        if (!(life->buf[0] = av_mallocz(sizeof(char) * life->h * life->w)) ||

-            !(life->buf[1] = av_mallocz(sizeof(char) * life->h * life->w))) {

+        if (!(life->buf[0] = av_calloc(life->h * life->w, sizeof(*life->buf[0]))) ||

+            !(life->buf[1] = av_calloc(life->h * life->w, sizeof(*life->buf[1])))) {

             av_free(life->buf[0]);

             av_free(life->buf[1]);

             return AVERROR(ENOMEM);