Fix creating unnecessary temporary object with refcount from https://github.com/albertodemichelis/squirrel/commit/b4f600ebc04ba1ebbc2bad0b3dfb5f18d5b11686

SquiLu/squirrel/sqtable.h

@@ -12,7 +12,7 @@
 
 #define hashptr(p)  ((SQHash)(((SQInteger)p) >> 3))
 
-inline SQHash HashObj(const SQObjectPtr &key)
+inline SQHash HashObj(const SQObject &key)
 {
 	switch(sq_type(key)) {
 		case OT_STRING:		return _string(key)->_hash;