Clean up three sets of warnings:

* Ensure all switches have a default when working with enums.
* Match defined new[] calls with delete[] calls.
* Respect variable initialization order.

src/ActorMultiVertex.cpp

@@ -326,6 +326,8 @@ void ActorMultiVertex::DrawInternal( const AMV_TweenState *TS )
 			DISPLAY->DrawSymmetricQuadStrip( &TS->vertices[FirstToDraw], NumToDraw );
 			break;
 		}
+		default:
+			break;
 	}
 
 	DISPLAY->SetEffectMode( EffectMode_Normal );
@@ -387,6 +389,8 @@ void ActorMultiVertex::SetVertsFromSplines()
 		case DrawMode_LineStrip:
 			SetVertsFromSplinesInternal(1, 0);
 			break;
+		default:
+			break;
 	}
 }
 
@@ -553,6 +557,8 @@ void ActorMultiVertex::UpdateAnimationState(bool force_update)
 					}
 				}
 				break;
+			default:
+				break;
 		}
 	}
 #undef STATE_ID