digging conjoined pits follow-up (trunk only)

Pat Rankin wrote:
>      Isn't an array of booleans overkill?  A single byte bitmap
> could achieve the same result.

include/trap.h

@@ -10,7 +10,7 @@
 union vlaunchinfo {
 	short v_launch_otyp;	/* type of object to be triggered */
 	coord v_launch2;	/* secondary launch point (for boulders) */
-	boolean v_conjoined[8];	/* conjoined pit locations */
+	uchar v_conjoined;	/* conjoined pit locations */
 };
 
 struct trap {