Improve the tin opener

src/apply.c

@@ -3494,18 +3494,8 @@ doapply()
         res = dowrite(obj);
         break;
     case TIN_OPENER:
-        if (!carrying(TIN)) {
-            You("have no tin to open.");
-            goto xit;
-        }
-        You("cannot open a tin without eating or discarding its contents.");
-        if (flags.verbose)
-            pline("In order to eat, use the 'e' command.");
-        if (obj != uwep)
-            pline(
-          "Opening the tin will be much easier if you wield the tin opener.");
-        goto xit;
-
+        res = use_tin_opener(obj);
+        break;
     case FIGURINE:
         use_figurine(&obj);
         break;