* 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.
