Added unreachable lines backit prtected by preprocessor guards

src/Scoreboard.cpp

@@ -30,7 +30,13 @@ AString cObjective::TypeToString(eType a_Type)
 		case otStatBlockMine:      return "stat.mineBlock";
 		case otStatEntityKill:     return "stat.killEntity";
 		case otStatEntityKilledBy: return "stat.entityKilledBy";
+		
+		// clang optimisises this line away then warns that it has done so.
+		#if !defined(__clang__)
+		default: return "";
+		#endif
 	}
+	
 }