Avoid compiler warning about uninitialized variables. Fixes this build warning: poster.c: In function ‘postersize’: poster.c:495:16: warning: ‘sizex’ may be used uninitialized [-Wmaybe-uninitialized] 495 | double sizex, sizey; /* size of the scaled image in ps units */ | ^~~~~ poster.c:495:23: warning: ‘sizey’ may be used uninitialized [-Wmaybe-uninitialized] 495 | double sizex, sizey; /* size of the scaled image in ps units */ | ^~~~~
