[clang] Fix -Wparentheses warning [NFC]

Without this gcc warns like
 ../../clang/lib/AST/ExprConstant.cpp:4091:63: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  4091 |          (SrcVal.isVector() && SrcVal.getVectorLength() == 1) &&
       |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
  4092 |              "Not a valid HLSLAggregateSplatCast.");
       |              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Author: mikaelholmen

clang/lib/AST/ExprConstant.cpp

@@ -4087,9 +4087,9 @@ static bool hlslAggSplatHelper(EvalInfo &Info, const Expr *E, APValue &SrcVal,
   if (!Evaluate(SrcVal, Info, E))
     return false;
 
-  assert(SrcVal.isFloat() || SrcVal.isInt() ||
-         (SrcVal.isVector() && SrcVal.getVectorLength() == 1) &&
-             "Not a valid HLSLAggregateSplatCast.");
+  assert((SrcVal.isFloat() || SrcVal.isInt() ||
+          (SrcVal.isVector() && SrcVal.getVectorLength() == 1)) &&
+         "Not a valid HLSLAggregateSplatCast.");
 
   if (SrcVal.isVector()) {
     assert(SrcTy->isVectorType() && "Type mismatch.");