call kbd_resize when showing

Since layer_surface_configure was changed to only call kbd_resize when
an output dimension changed, kbd_resize doesn't get called if the
keyboard was hidden and is being shown again, meaning it doesn't tell
the compositor about the scale.

This causes it to only output the top-right quarter of the keybaord
stretched to the entire window size after a SIGUSR1 + SIGUSR2 cycle with
the display scale set to 2.

Signed-off-by: Maarten van Gompel <proycon@anaproy.nl>

main.c

@@ -405,6 +405,7 @@ show(int sigint) {
 	wl_surface_commit(draw_surf.surf);
 
 	wl_display_roundtrip(display);
+	kbd_resize(&keyboard, layouts, NumLayouts);
 	drwsurf_flip(&draw_surf);
 
 	hidden = false;