Fix compile error on post-assign non-cast parenthesis

Fixes compile error in the following example code:
```
@A = (1 + 2)
msg(123)
```

Author: Pieter12345

src/main/java/com/laytonsmith/core/functions/Compiler.java

@@ -222,7 +222,8 @@ public static ParseTree rewrite(List<ParseTree> list, boolean returnSConcat,
 								|| (list.get(index).getData() instanceof CFunction cf
 										&& cf.hasFunction() && cf.getFunction() != null
 										&& cf.getFunction().getName().equals(Compiler.p.NAME)
-										&& list.get(index).numberOfChildren() == 1))) {
+										&& list.get(index).numberOfChildren() == 1
+										&& __type_ref__.createFromBareStringOrConcats(list.get(index)) != null))) {
 							valChildren.add(list.get(index));
 							list.remove(index);
 						}