R363 - can't drown breathless monsters

- if you're polymorphed into an eel, you were able to drown things like xorns
- also, fix the tombstone message when an eel drowns you, it was basing the
message on your location, not the eel's location

doc/fixes34.1

@@ -45,6 +45,7 @@ touch_artifact checks needed when snagging w/bullwhip and stealing
 cannot trip over submerged objects if you're water walking
 wand of striking was not identified if it activated a statue trap
 cannot sacrifice while you're swallowed
+player polymorphed into an eel cannot drown breathless/amphibious monsters
 
 
 Platform- and/or Interface-Specific Fixes

src/mhitu.c

@@ -1158,8 +1158,9 @@ do_stone:
 		    } else if(u.ustuck == mtmp) {
 			if (is_pool(mtmp->mx,mtmp->my) && !Swimming
 			    && !Amphibious) {
-			    boolean moat = (levl[u.ux][u.uy].typ != POOL) &&
-				(levl[u.ux][u.uy].typ != WATER) &&
+			    boolean moat =
+				(levl[mtmp->mx][mtmp->my].typ != POOL) &&
+				(levl[mtmp->mx][mtmp->my].typ != WATER) &&
 				!Is_medusa_level(&u.uz) &&
 				!Is_waterlevel(&u.uz);
 

src/uhitm.c

@@ -1417,7 +1417,8 @@ register struct attack *mattk;
 			}
 		    } else if(u.ustuck == mdef) {
 			/* Monsters don't wear amulets of magical breathing */
-			if (is_pool(u.ux,u.uy) && !is_swimmer(mdef->data)) {
+			if (is_pool(u.ux,u.uy) && !is_swimmer(mdef->data) &&
+			    !amphibious(mdef->data)) {
 			    You("drown %s...", mon_nam(mdef));
 			    tmp = mdef->mhp;
 			} else if(mattk->aatyp == AT_HUGS)