sleeping monster responding to attacks

when msleeping is set, mcanmove is not cleared.  mcanmove applies only to
mfrozen.  So, mattackm needs to test both mcanmove and msleeping.
mattackm will not wake the defender if the attack misses.

src/mhitm.c

@@ -203,7 +203,7 @@ mattackm(magr, mdef)
     struct permonst *pa, *pd;
 
     if (!magr || !mdef) return(MM_MISS);		/* mike@genat */
-    if (!magr->mcanmove) return(MM_MISS);		/* riv05!a3 */
+    if (!magr->mcanmove || magr->msleeping) return(MM_MISS);
     pa = magr->data;  pd = mdef->data;
 
     /* Grid bugs cannot attack at an angle. */