lib/bitmap.c: fix spello

Fix typo/spello for whitespaces.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/lib/bitmap.c b/lib/bitmap.c
index 89260aa..a801379 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -551,7 +551,7 @@
 }
 
 /*
- * The format allows commas and whitespases at the beginning
+ * The format allows commas and whitespaces at the beginning
  * of the region.
  */
 static const char *bitmap_find_region(const char *str)