- fixed GC::FullGC not collecting everything anymore.

With the delayed handling of internal references of destroyed objects the function now returned without making sure that it really got everything.
Repeating until it cannot delete anything new anymore makes it work again as intended.

source/common/objects/dobjgc.cpp

@@ -550,6 +550,10 @@ void Step()
 
 void FullGC()
 {
+	bool ContinueCheck = true;
+	while (ContinueCheck)
+	{
+		ContinueCheck = false;
 		if (State <= GCS_Propagate)
 		{
 			// Reset sweep mark to sweep all elements (returning them to white)
@@ -571,8 +575,10 @@ void FullGC()
 			{
 				SingleStep();
 			}
+			ContinueCheck |= HadToDestroy;
 		} while (HadToDestroy);
 	}
+}
 
 //==========================================================================
 //