Added Rune Knight to atcommand bodystyle

* Fixes #2746.
Thanks to @mazvi!

src/map/atcommand.cpp

@@ -1773,7 +1773,7 @@ ACMD_FUNC(bodystyle)
 		|| (sd->class_&MAPID_THIRDMASK) == MAPID_ARCH_BISHOP || (sd->class_&MAPID_THIRDMASK) == MAPID_RANGER
 		|| (sd->class_&MAPID_THIRDMASK) == MAPID_WARLOCK || (sd->class_&MAPID_THIRDMASK) == MAPID_SHADOW_CHASER
 	    || (sd->class_&MAPID_THIRDMASK) == MAPID_MINSTRELWANDERER || (sd->class_&MAPID_THIRDMASK) == MAPID_SORCERER
-		|| (sd->class_&MAPID_THIRDMASK) == MAPID_SURA)) {
+		|| (sd->class_&MAPID_THIRDMASK) == MAPID_SURA || (sd->class_&MAPID_THIRDMASK) == MAPID_RUNE_KNIGHT)) {
 		clif_displaymessage(fd, msg_txt(sd,740));	// This job has no alternate body styles.
 		return -1;
 	}