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.

doc/fixes37.0

@@ -75,6 +75,7 @@ when punished, involuntarily teleporting and landing within chain range of
 	"remove_object: obj not on floor" panic on hero's next move
 inventory cursing caused by "this water's no good" effect when drinking from
 	a fountain didn't update persistent inventory window
+fix priest created inside temple wall
 
 
 Fixes to 3.7.0-x Problems that Were Exposed Via git Repository

include/extern.h

@@ -2490,6 +2490,7 @@ E void FDECL(selection_free, (struct selectionvar *, BOOLEAN_P));
 E void FDECL(set_selection_floodfillchk, (int FDECL((*), (int,int))));
 E void FDECL(selection_floodfill, (struct selectionvar *, int, int,
                                    BOOLEAN_P));
+E boolean FDECL(pm_good_location, (int, int, struct permonst *));
 E void FDECL(get_location_coord, (schar *, schar *, int, struct mkroom *,
                                   long));
 E void FDECL(selection_setpoint, (int, int, struct selectionvar *, XCHAR_P));

src/priest.c

@@ -232,12 +232,22 @@ boolean sanctum; /* is it the seat of the high priest? */
     struct monst *priest;
     struct obj *otmp;
     int cnt;
+    int px, py, i, si = rn2(8);
+    struct permonst *prim = &mons[sanctum ? PM_HIGH_PRIEST : PM_ALIGNED_PRIEST];
 
-    if (MON_AT(sx + 1, sy))
+    for (i = 0; i < 8; i++) {
-        (void) rloc(m_at(sx + 1, sy), FALSE); /* insurance */
+        px = sx + xdir[(i+si) % 8];
+        py = sy + ydir[(i+si) % 8];
+        if (pm_good_location(px, py, prim))
+            break;
+    }
+    if (i == 8)
+        px = sx, py = sy;
 
-    priest = makemon(&mons[sanctum ? PM_HIGH_PRIEST : PM_ALIGNED_PRIEST],
+    if (MON_AT(px, py))
-                     sx + 1, sy, MM_EPRI);
+        (void) rloc(m_at(px, py), FALSE); /* insurance */
+
+    priest = makemon(prim, px, py, MM_EPRI);
     if (priest) {
         EPRI(priest)->shroom = (schar) ((sroom - g.rooms) + ROOMOFFSET);
         EPRI(priest)->shralign = Amask2align(levl[sx][sy].altarmask);

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;