Forbid creation of wxPaintEvent objects from user code

This doesn't work anyhow, so it's better to prevent the code doing this
from compiling instead of getting run-time asserts or worse.

Also simplify construction of these events inside wxWidgets by passing
the window itself to the ctor instead of passing just its ID and calling
SetEventObject() separately later.

For consistency, do the same thing for wxNcPaintEvent too.

tests/events/evthandler.cpp

@@ -534,3 +534,14 @@ public:
     void OnIdle(wxIdleEvent&) { }
 };
 #endif // C++11
+
+// Another compilation-time-only test, but this one checking that these event
+// objects can't be created from outside of the library.
+#ifdef TEST_INVALID_EVENT_CREATION
+
+void TestEventCreation()
+{
+    wxPaintEvent eventPaint;
+}
+
+#endif // TEST_INVALID_EVENT_CREATION

tests/test.bkl

@@ -365,9 +365,9 @@ failtest_combobox:
 
 failtest_evthandler:
 	@$(RM) test_evthandler.o
-	@for d in GLOBAL STATIC METHOD FUNCTOR NO_HANDLER DERIVED WRONG_CLASS; do \
-	    if $(MAKE) CXXWARNINGS=-DTEST_INVALID_BIND_$$d test_evthandler.o 2>/dev/null; then \
-	        echo "*** Compilation with TEST_INVALID_BIND_$$d unexpectedly succeeded.">&2; \
+	@for d in BIND_GLOBAL BIND_STATIC BIND_METHOD BIND_FUNCTOR BIND_NO_HANDLER BIND_DERIVED BIND_WRONG_CLASS EVENT_CREATION; do \
+	    if $(MAKE) CXXWARNINGS=-DTEST_INVALID_$$d test_evthandler.o 2>/dev/null; then \
+	        echo "*** Compilation with TEST_INVALID_$$d unexpectedly succeeded.">&2; \
 	        exit 1; \
 	    fi; \
 	done; \