small monsters seeping through their shirt

The code is slightly different than in the PR which left out the noncorporeal case.

Closes #397

doc/fixes37.0

@@ -270,6 +270,7 @@ make piranhas faster and give them extra bite attack
 fire sources can ignite candles, lamps, and potions of oil
 for multiple drop ('D') with menustyle traditional or combination, if the only
 	object class player picked was '$' then it operated on all classes
+small monsters could seep through their shirt
 
 
 Fixes to 3.7.0-x Problems that Were Exposed Via git Repository

src/worn.c

@@ -917,7 +917,8 @@ boolean polyspot;
         }
         if ((otmp = which_armor(mon, W_ARMU)) != 0) {
             if (vis) {
-                if (sliparm(mon->data))
+                /* sliparm checks whirly, noncorporeal, and small or under */
+                if (sliparm(mdat) && !(mdat->msize <= MZ_SMALL))
                     pline("%s seeps right through %s shirt!", Monnam(mon),
                           ppronoun);
                 else