[clang][Interp][NFC] Move ToVoid casts to the bottom

So we have all the complex casts together.

Author: tbaederr

clang/lib/AST/Interp/ByteCodeExprGen.cpp

@@ -291,9 +291,6 @@ bool ByteCodeExprGen<Emitter>::VisitCastExpr(const CastExpr *CE) {
   case CK_FloatingComplexToReal:
     return this->emitComplexReal(SubExpr);
 
-  case CK_ToVoid:
-    return discard(SubExpr);
-
   case CK_IntegralRealToComplex:
   case CK_FloatingRealToComplex: {
     // We're creating a complex value here, so we need to
@@ -317,6 +314,9 @@ bool ByteCodeExprGen<Emitter>::VisitCastExpr(const CastExpr *CE) {
     return this->emitInitElem(T, 1, SubExpr);
   }
 
+  case CK_ToVoid:
+    return discard(SubExpr);
+
   default:
     assert(false && "Cast not implemented");
   }