Reinstate isCatchClauseVariableDeclaration

Author: ahejlsberg

src/compiler/utilities.ts

@@ -10346,6 +10346,11 @@ export function isInfinityOrNaNString(name: string | __String): boolean {
     return name === "Infinity" || name === "-Infinity" || name === "NaN";
 }
 
+/** @internal */
+export function isCatchClauseVariableDeclaration(node: Node) {
+    return node.kind === SyntaxKind.VariableDeclaration && node.parent.kind === SyntaxKind.CatchClause;
+}
+
 /** @internal */
 export function isFunctionExpressionOrArrowFunction(node: Node): node is FunctionExpression | ArrowFunction {
     return node.kind === SyntaxKind.FunctionExpression || node.kind === SyntaxKind.ArrowFunction;