mimic caught in explosion printed message but wasn't discovered

- add seemimic call before printing the "caught" message

doc/fixes34.1

@@ -23,6 +23,7 @@ don't drop corpse when a monster kills another monster on an inaccessible
 	location (i.e. behave like xkilled behaves)
 half-physical-damage from gas spore explosion should only affect you
 Sunsword didn't stop glowing when hero killed a monster wielding it
+mimics caught in explosions with messages printed about them are discovered
 
 
 Platform- and/or Interface-Specific Fixes

src/explode.c

@@ -264,8 +264,10 @@ int expltype;
 				      (adtyp == AD_DRST) ? "intoxicated" :
 				      (adtyp == AD_ACID) ? "burned" :
 				       "fried");
-		} else if (cansee(i+x-1, j+y-1))
+		} else if (cansee(i+x-1, j+y-1)) {
+		    if(mtmp->m_ap_type) seemimic(mtmp);
 		    pline("%s is caught in the %s!", Monnam(mtmp), str);
+		}
 
 		idamres += destroy_mitem(mtmp, SCROLL_CLASS, (int) adtyp);
 		idamres += destroy_mitem(mtmp, SPBOOK_CLASS, (int) adtyp);