debugger: remove disassembler view location marker when cleaning up views

src/plugins/debugger/debuggeragents.cpp

@@ -201,6 +201,8 @@ DisassemblerViewAgent::~DisassemblerViewAgent()
 void DisassemblerViewAgent::cleanup()
 {
     d->cache.clear();
+    if (d->editor)
+        d->editor->markableInterface()->removeMark(d->locationMark);
     //if (d->editor)
     //    d->editor->deleteLater();
     //d->editor = 0;