* 12to11.c (XLMain): Initialize keyboard shortcut inhibition.
* Imakefile (SRCS): Add keyboard_shortcuts_inhibit.c.
(OBJS): Add keyboard_shortcuts_inhibit.o.
* compositor.h (enum _ClientDataType): Add ShortcutInhibitData.
(struct _ClientData): New structure.
(struct _Surface): Make client data a linked list.
* pointer_constraints.c (Reconfine, XLPointerBarrierLeft)
(XLPointerBarrierCheck, XLPointerConstraintsSurfaceMovedTo):
Adjust to new client data storage approach.
* seat.c (struct _Seat): New fields `last_focus_time' and
`external_grab_time'.
(HandleBind, SelectDeviceEvents, SetFocusSurface): Use size_t to
represent mask length.
(DispatchFocusIn): Set last focus time.
(FakePointerEdge, XLSelectStandardEvents): Likewise; use size_t.
(XLSeatExplicitlyGrabSurface): Clear active grab.
(XLSeatBeginDrag): Use size_t to represent XI mask length.
(XLSeatApplyExternalGrab, XLSeatCancelExternalGrab): New
functions.
* subsurface.c (Teardown, XLSubsurfaceHandleParentCommit):
Adjust client data storage.
* surface.c (HandleSurfaceDestroy, XLSurfaceGetClientData):
Adjust client data storage to use a linked list.
(XLSurfaceFindClientData): New function.
* text_input.c (FilterInputCallback): Pacify cppcheck.
* compositor.h (XLAssert): Make a macro.
* dnd.c (HandleCirculateNotify, HandleReparentNotify): Fix NULL
checks.
(ReadProtocolProperties): Return suitable values for windows
that aren't in the cache.
* egl.c (HaveEglExtension1): Avoid redundant assignment to n.
* fns.c (XLAssert): Delete function.
* picture_renderer.c (GetRenderDevice): Remove redundant TODO.
(BufferFromShm): Assert that pict_format is non-NULL.
(ValidateShmParams): Likewise.
* pointer_constraints.c (ApplyLines): Remove redundant
assignment to i.
* renderer.c (PickRenderer): Fix build with non-GCC compilers.
* seat.c (ComputeHotspot): Return values when surface is NULL.
(XLSeatExplicitlyGrabSurface): Don't save keyboard grab state.
* shm.c (CreatePool): Close fd and return if pool could not be
allocated.
* subcompositor.c (GetContentScale): Move earlier.
(ViewDamageBuffer, ViewGetContentScale): New functions.
(SubcompositorUpdate): Remove redundant assignment.
* surface.c (ApplyViewport): Make dest_width and dest_height
double.
(ApplyDamage): Call ViewDamageBuffer.
(ScaleToWindow):
* text_input.c (HandleNewIM):
* xdg_toplevel.c (SendDecorationConfigure1, HandleWmStateChange)
(HandleAllowedActionsChange, HandleDecorationResourceDestroy):
Avoid NULL pointer dereferences in various cases.
