moved MOUSEMASK into event.c (not used in other places)

dwm.h

@@ -36,7 +36,6 @@
 
 /* mask shorthands, used in event.c and client.c */
 #define BUTTONMASK		(ButtonPressMask | ButtonReleaseMask)
-#define MOUSEMASK		(BUTTONMASK | PointerMotionMask)
 /* other stuff used in different places */
 #define BORDERPX		1
 #define PROTODELWIN		1

event.c

@@ -18,6 +18,7 @@ typedef struct {
 KEYS
 
 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
+#define MOUSEMASK		(BUTTONMASK | PointerMotionMask)
 
 static void
 movemouse(Client *c) {