Revert "Fixing a couple of issues within core."

This reverts commit 5b30475396.

src/core/lib/channel/channel_args.c

@@ -74,8 +74,7 @@ grpc_channel_args *grpc_channel_args_copy_and_add(const grpc_channel_args *src,
     return dst;
   }
   dst->num_args = src_num_args + num_to_add;
-  dst->args =
-      dst->num_args ? gpr_malloc(sizeof(grpc_arg) * dst->num_args) : NULL;
+  dst->args = gpr_malloc(sizeof(grpc_arg) * dst->num_args);
   for (i = 0; i < src_num_args; i++) {
     dst->args[i] = copy_arg(&src->args[i]);
   }

src/core/lib/surface/server.c

@@ -251,9 +251,7 @@ static void channel_broadcaster_init(grpc_server *s, channel_broadcaster *cb) {
     count++;
   }
   cb->num_channels = count;
-  cb->channels = cb->num_channels
-                     ? gpr_malloc(sizeof(*cb->channels) * cb->num_channels)
-                     : NULL;
+  cb->channels = gpr_malloc(sizeof(*cb->channels) * cb->num_channels);
   count = 0;
   for (c = s->root_channel_data.next; c != &s->root_channel_data; c = c->next) {
     cb->channels[count++] = c->channel;