[clang] [Safe Buffers] Fix a small bug recently found (PR #102953)

[Ziqing Luo via cfe-commits]

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@@ -404,7 +404,7 @@ AST_MATCHER(CXXConstructExpr, isSafeSpanTwoParamConstruct) {
 
   if (Arg0Ty->isConstantArrayType()) {
     const APSInt ConstArrSize =
-        APSInt(cast<ConstantArrayType>(Arg0Ty)->getSize());
+        APSInt(cast<ConstantArrayType>(Arg0Ty.getCanonicalType())->getSize());
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ziqingluo-90 wrote:

Have changed to use `ASTContext::getAsConstantArrayType()`

https://github.com/llvm/llvm-project/pull/102953