Change fall through comment in xmodmap.c to match gcc's requirements

Needs to match one of the regexps shown under
https://gcc.gnu.org/onlinedocs/gcc-7.3.0/gcc/Warning-Options.html#index-Wimplicit-fallthrough

Silences warning from gcc 7.3.0:

xmodmap.c: In function ‘main’:
xmodmap.c:358:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
   arg[1] = tolower (arg[1]);
   ~~~~~~~^~~~~~~~~~~~~~~~~~
xmodmap.c:360:8: note: here
        case 's':
        ^~~~

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/xmodmap.c b/xmodmap.c
index 22677dc..ef8b1f3 100644
--- a/xmodmap.c
+++ b/xmodmap.c
@@ -356,7 +356,7 @@ main(int argc, char *argv[])
 	      case 'L':
 	      case 'C':
 		arg[1] = tolower (arg[1]);
-		/* fall through to handler below */
+		/* fall through - to handler below */
 	      case 's':
 	      case 'l':
 	      case 'c': {