Fix for #4524:

- Fix expTypeFromExpFlag in CodegenCFunction.tpl for size expressions.

Author: perost

Compiler/Template/CodegenCFunctions.tpl

@@ -3689,9 +3689,9 @@ template expTypeFromExpFlag(Exp exp, Integer flag)
   case c as CODE(__)     then expTypeFlag(c.ty, flag)
   case c as ASUB(__)     then expTypeFlag(typeof(c), flag)
   case REDUCTION(__)     then expTypeFlag(typeof(exp), flag)
-  case CONS(__)
-  case LIST(__)
-  case SIZE(__)          then expTypeFlag(typeof(exp), flag)
+  case e as CONS(__)
+  case e as LIST(__)
+  case e as SIZE(__)     then expTypeFlag(typeof(e), flag)
 
   case META_TUPLE(__)
   case META_OPTION(__)