vnc: Add break statement

This was not a bug, but it is not common practice to omit the break statement
from the last case statement before an empty default case.

Any change of the default case would introduce a bug.

This was reported as a warning by splint.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>

ui/vnc-enc-hextile-template.h

diff --git a/ui/vnc-enc-hextile-template.h b/ui/vnc-enc-hextile-template.h
index b9f9f5e..a7310e1 100644
--- a/ui/vnc-enc-hextile-template.h
+++ b/ui/vnc-enc-hextile-template.h
@@ -175,6 +175,7 @@
 	    /* we really don't have to invalidate either the bg or fg
 	       but we've lost the old values.  oh well. */
 	}
+        break;
     default:
 	break;
     }