d2126027ce
Such containers never require a pixmap anyway. In particular for the __i3 output (used for the scratchpad workspace), this would cause an allocation error anyway because it can be very big -- so big, in fact, that X cannot allocate the pixmap for it. Until now, this error was silently ignored due to the fact that we did not create the pixmap checked (and asserted its success), but with cairo this would cause a crash because we'd try to create a surface for a pixmap which doesn't exist. relates to #1278
