mem_malloc type triviality checks (7/8)

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

editor/ScriptStudio.cpp

@@ -463,7 +463,7 @@ bool CScriptStudio::FindNext(char *w) {
 
   // Make a copy of the script to work with
   char *text;
-  text = (char *)mem_malloc(m_EditText.GetLength() + 1);
+  text = mem_rmalloc<char>(m_EditText.GetLength() + 1);
   if (!text)
     Int3();
   strcpy(text, (LPCSTR)m_EditText);