Misc semantics fixes:

- don't allow pre-array object versions to return a struct containing an array 
 - special case -2147483648 / -1
 - include "~" in the full integer functionality checks
 - handle multiple function parameters having the same name



git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24010 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/constFold.frag

@@ -112,4 +112,8 @@ void foo2()
     m2[-1][1];  // ERROR
     m3[1][3];   // ERROR
     m3[3][1];   // ERROR
-}
+    int p;
+    p = -2147483647 / -1;
+    p = -2147483648 / -1;
+    p =  2147483647 / -1;
+}