Avoid narrowing conversion

Add explicit casts when initializing an int[] using {}'s, as required by
C++11 to be "well formed". This fixes the only (current) -Wnarrowing
warning.

Change-Id: I7f190549a8a54a9061678a926d5478256c2084be
Reviewed-by: John Ehresman <jpe@wingware.com>
Fix shadowed virtuals

Change GlobalReceiver to explicitly 'use' [dis]connectNotify of the base
class in order to avoid hiding these with its own overloads. This fixes
the only (current) -Woverloaded-virtual warning.

Change-Id: I364b9939f9078029861054051148c319071fbbe1
Reviewed-by: John Ehresman <jpe@wingware.com>
Fix PYSIDE-190

QCoreApplication would deadlock on exit if the global
QThreadPool.globalInstance() is running a QRunnable with python
code because the destroyQCoreApplication function would not
release the the GIL which `delete`ing the QCoreApplication.

Change-Id: I7b8a3bbd33f86050368a9357fa93e25a642b4ac5
Reviewed-by: John Ehresman <jpe@wingware.com>