getkey: properly specify -1 as blocking repeats, not 0

Test case was flawed.

include/gint/keyboard.h

@@ -281,9 +281,9 @@ getkey_profile_t getkey_repeat_profile(void);
    @count     Number of previous repeats (0 on the first call)
 
    The profile function must either return a positive number of microseconds to
-   wait until the next repeat, or 0 to block the repeat indefinitely. Note that
-   the keyboard device typically updates every 7-8 ms, timings are tracked in
-   microseconds only to limit deviations.
+   wait until the next repeat, or -1 to block the repeat indefinitely. Note
+   that the keyboard device typically updates every 7-8 ms, timings are tracked
+   in microseconds only to limit deviations.
 
    Setting a repeat profile overrides GETKEY_REP_ARROWS, GETKEY_REP_ALL, and
    the repeat delays. Calling with profile=NULL restores this behavior.

src/render-fx/bopti.c

@@ -203,7 +203,7 @@ void bopti_render(bopti_image_t const *img, struct rbox *rbox, uint32_t *v1,
 	  .columns      = rbox->columns,
 	  .masks        = masks + 2 * left_origin,
 	  .real_start   = (left_origin > 0),
-	  .real_end     = (rbox->x & 31) && (left_origin + img_columns < 5),
+	  .real_end     = (rbox->x & 31) && (left_origin + rbox->columns < 5),
 	  .vram_stride  = 4 - rbox->columns,
 	  .data_stride  = ((img_columns - rbox->columns) << 2) * layers,
 	  .gray         = (v2 != NULL),