fix warnings found by clang 3.5 and c++11 (fixes ROOT-5899).

bindings/pyroot/src/TCustomPyTypes.cxx

config/Makefile.linux

config/Makefile.linuxx8664gcc

core/base/src/TQConnection.cxx

core/base/src/TQObject.cxx

core/base/src/TString.cxx

core/base/src/TUri.cxx

core/newdelete/src/NewDelete.cxx

geom/geom/src/TGeoCache.cxx

graf2d/asimage/src/TASImage.cxx

graf2d/fitsio/src/TFITS.cxx

graf2d/x11/src/Rotated.cxx

graf3d/eve/src/TEveTrackPropagator.cxx

gui/gui/src/TGButtonGroup.cxx

gui/gui/src/TGToolBar.cxx

gui/sessionviewer/src/TProofProgressDialog.cxx

math/mathcore/src/TRandom3.cxx

math/physics/src/TLorentzVector.cxx

misc/memstat/Module.mk

net/auth/src/rsaaux.cxx