mem_malloc type triviality checks (4/8)

```
git grep -l mem_malloc | xargs perl -i -lpe 's{\((\w+) \*\)mem_malloc\((\S+) \* sizeof\(\1\)\)}{mem_rmalloc<$1 *>($2)}'
```

editor/ScriptMassCompile.cpp

@@ -145,7 +145,7 @@ void CScriptMassCompile::OnBuild() {
 
   if (list_size == 0)
     return;
-  index_map = (int *)mem_malloc(list_size * sizeof(int));
+  index_map = mem_rmalloc<int>(list_size);
   if (!index_map)
     return;