Fix priest generated inside temple wall

In a rare case, a random room's width can be 2 tiles, and if
that room was converted into a temple, the priest ended up
inside the wall. Try to put the priest on a random valid position
around the altar, or on it.

src/sp_lev.c

@@ -1084,6 +1084,14 @@ register int humidity;
     return FALSE;
 }
 
+boolean
+pm_good_location(x, y, pm)
+int x, y;
+struct permonst *pm;
+{
+    return is_ok_location(x, y, pm_to_humidity(pm));
+}
+
 static unpacked_coord
 get_unpacked_coord(loc, defhumidity)
 long loc;