fix (Qt) issues found by clang's clazy tool:

+ -Wclazy-incorrect-emit
+ -Wclazy-strict-iterators
+ -Wclazy-overloaded-signal
+ -Wclazy-qstring-arg
+ -Wclazy-unused-non-trivial-variable
+ -Wclazy-container-anti-pattern
+ -Wclazy-range-loop-reference
+ -Wclazy-const-signal-or-slot
+ -Wclazy-detaching-temporary
+ -Wclazy-qfileinfo-exists

src/Gui/PythonDebugger.cpp

@@ -509,22 +509,22 @@ bool PythonDebugger::stop()
 void PythonDebugger::tryStop()
 {
     d->trystop = true;
-    signalNextStep();
+    Q_EMIT signalNextStep();
 }
 
 void PythonDebugger::stepOver()
 {
-    signalNextStep();
+    Q_EMIT signalNextStep();
 }
 
 void PythonDebugger::stepInto()
 {
-    signalNextStep();
+    Q_EMIT signalNextStep();
 }
 
 void PythonDebugger::stepRun()
 {
-    signalNextStep();
+    Q_EMIT signalNextStep();
 }
 
 void PythonDebugger::showDebugMarker(const QString& fn, int line)