WaE implicit conversion of NULL constant to 'bool' [-Wnull-conversion]

Change-Id: I8f208d6c87275aa4a169c7c6ed219200617c5669
WaE: [-Wsometimes-uninitialized]

Change-Id: Ie51a67474631ecfb0b223bd2f5a63ae8bf363e42
put these classes into an anonymous namespace

Change-Id: I29a30fcc8adab34fbe05a927d438c4e34d5c517b
WaE: unused variable 'aString'

Change-Id: Ie548ad26b7bb2a8ced4e821296b44586aad4026a
loplugin:saloverride

Change-Id: Id7de67480c6f8a31c7b7d6e560e6724fd09d8957
loplugin:unreffun

Change-Id: I230479415a4a822dda22e1795af56572a93cb802
-Werror,-Wheader-guard

Change-Id: I692d2011902f46d2ca48b4d1d0a2516026e5cae3
loplugin:unreffun

Change-Id: Ia35c1b529d51882b48779d8e13afbe17ae66e937
loplugin:staticcall

Change-Id: I33927305351b6e84721c11e3a1814266b41db8da
vcl: the docs say gdk_window_get_screen was added in GTK+ 2.24

Change-Id: Ib9b108c034181c0f94cbf86634447ba2d4afbaa5
mpPixmap uninitialized in one ctor

Change-Id: Iffa82b96610dd1fe5900ca796af413a116d2dd28
vcl: cleanup the opengl selection API.

Change-Id: Icebf3c7d2911b27e29d2259b780a04048b293b3c
only call XFreePixmap on pixmaps created via XCreatePixmap

not on those belonging to gdk shoe-horned in via

mpPixmap = GDK_PIXMAP_XID( mpGdkPixmap );

in GdkX11Pixmap::GdkX11Pixmap

This stops file->new->presentation crashing on second invocation

Change-Id: Iec673497f900b0ddabd439369b9ffe554800d425