Lua - Fix char pointers, wchar_t pointers and char arrays so that nil can be passed as a valid value

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@11963 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/char_strings.i

@@ -109,6 +109,12 @@ bool SetConstCharArrayStaticString(const char str[], unsigned int number) {
 char *CharPingPong(char *str) {
   return str;
 }
+char *CharArrayPingPong(char abcstr[]) {
+  return abcstr;
+}
+char *CharArrayDimsPingPong(char abcstr[16]) {
+  return abcstr;
+}
 
 // variables
 char *global_char = NULL;