Debugger: Protect reloadRegisters against early calls.

Check for correct state (InferiorStopped).

src/plugins/debugger/cdb/cdbdebugengine.cpp

@@ -1588,6 +1588,8 @@ QList<Symbol> CdbDebugEngine::moduleSymbols(const QString &moduleName)
 
 void CdbDebugEngine::reloadRegisters()
 {
+    if (state() != InferiorStopped)
+        return;
     const int intBase = 10;
     if (debugCDB)
         qDebug() << Q_FUNC_INFO << intBase;

src/plugins/debugger/gdb/gdbengine.cpp

@@ -2555,6 +2555,8 @@ void GdbEngine::handleStackListThreads(const GdbResponse &response)
 
 void GdbEngine::reloadRegisters()
 {
+    if (state() != InferiorStopped)
+        return;
     if (!m_registerNamesListed) {
         postCommand(_("-data-list-register-names"), CB(handleRegisterListNames));
         m_registerNamesListed = true;