several fixes for farming changes

* don't let player wish for multiple globs
* use newsym() to clean up merged globs on floor
* food effects should match original corpse effects
* tidy up remaining crash when merging in place

src/do.c

@@ -217,8 +217,8 @@ const char *verb;
         while (obj && (otmp = obj_nexto_xy(obj->otyp, x, y, obj->o_id)) != (struct obj*)0) {
             pline("The %s coalesce.", makeplural(obj_typename(obj->otyp)));
             obj_meld(&obj, &otmp);
-            return (obj == NULL); 
         }
+        return (obj == NULL); 
     }
     return FALSE;
 }