🧹 Fix a couple more compilation warnings

Source/dead.cpp

@@ -65,7 +65,7 @@ void InitDead()
 		}
 	}
 
-	assert(nd <= MaxDead);
+	assert(static_cast<unsigned>(nd) <= MaxDead);
 }
 
 void AddDead(Point tilePosition, int8_t dv, direction ddir)

Source/towners.cpp

@@ -204,7 +204,6 @@ void NewTownerAnim(int tnum, BYTE *pAnim, uint8_t numFrames, int Delay)
 
 void InitTownerInfo(int i, int w, bool sel, _talker_id t, int x, int y, int ao)
 {
-	memset(&towners[i], 0, sizeof(TownerStruct));
 	towners[i]._tSelFlag = sel;
 	towners[i]._tAnimWidth = w;
 	towners[i]._tMsgSaid = false;