rename scrotWaitUntil -> scrotSleepUntil

also merge the two comments with similar purpose into one.

src/scrot.c

@@ -75,7 +75,7 @@ static Imlib_Image scrotGrabFocused(void);
 static void applyFilterIfRequired(void);
 static Imlib_Image scrotGrabAutoselect(void);
 static long miliToNanoSec(int);
-static void scrotWaitUntil(const struct timespec *);
+static void scrotSleepUntil(const struct timespec *);
 static Imlib_Image scrotGrabShotMulti(void);
 static Imlib_Image scrotGrabShotMonitor(void);
 static Imlib_Image scrotGrabStackWindows(void);
@@ -337,12 +337,12 @@ void scrotDoDelay(void)
         for (int i = opt.delay; i > 0; i--) {
             dprintf(STDERR_FILENO, "%d.. ", i);
             opt.delayStart.tv_sec++;
-            scrotWaitUntil(&opt.delayStart);
+            scrotSleepUntil(&opt.delayStart);
         }
         dprintf(STDERR_FILENO, "0.\n");
     } else {
         opt.delayStart.tv_sec += opt.delay;
-        scrotWaitUntil(&opt.delayStart);
+        scrotSleepUntil(&opt.delayStart);
     }
 }
 
@@ -361,16 +361,14 @@ void scrotSleepFor(int ms)
     bool overflow = tmp.tv_nsec >= miliToNanoSec(1000);
     tmp.tv_sec  += overflow;
     tmp.tv_nsec -= overflow ? miliToNanoSec(1000) : 0;
-    scrotWaitUntil(&tmp);
+    scrotSleepUntil(&tmp);
 }
 
-/* scrotWaitUntil: clock_nanosleep with a simpler interface and no EINTR nagging
+/* OpenBSD and OS X lack clock_nanosleep(), so we use nanosleep() and a trivial
+ * algorithm to correct for drift. Also takes care of EINTR.
  */
-static void scrotWaitUntil(const struct timespec *time)
+static void scrotSleepUntil(const struct timespec *time)
 {
-    /* OpenBSD and OS X lack clock_nanosleep(), so we use a trivial algorithm to
-     * correct for drift and call nanosleep() everywhere.
-     */
     struct timespec tmp;
     do {
         clock_gettime(CONTINUOUS_CLOCK, &tmp);