Debugger: Fix metaObject extraction logic

A variable name mixup, potentially leading to endless loops.

Change-Id: I43f430ec89a8230da665fbfcef8d7f1491b0e2c0
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

share/qtcreator/debugger/dumper.py

@@ -1417,7 +1417,7 @@ class DumperBase:
             #    warn("METAOBJECT EXTRACTION FAILED FOR UNKNOWN REASON")
 
             if not result:
-                base = self.directBaseClass(typeobj, 0)
+                base = self.directBaseClass(someTypeObj, 0)
                 if base != someTypeObj: # sanity check
                     result = extractStaticMetaObjectPtrFromType(base)