Whitespace corrections

Signed-off-by: Murray Calavera <murray.calavera@gmail.com>
diff --git a/src/libbacklight.h b/src/libbacklight.h
index 0c32671..0d3293d 100644
--- a/src/libbacklight.h
+++ b/src/libbacklight.h
@@ -5,7 +5,7 @@
 
 #ifdef __cplusplus
 extern "C" {
-#endif 
+#endif
 
 enum backlight_type {
 	BACKLIGHT_RAW,