fix flag has changed

Author: samsonasik

rules/CodeQuality/Rector/Catch_/ThrowWithPreviousExceptionRector.php

@@ -165,30 +165,30 @@ private function refactorThrow(Throw_ $throw, Variable $caughtThrowableVariable)
                     name: $shouldUseNamedArguments ? new Identifier('code') : null
                 );
                 $hasChanged = true;
-            } else {
+            } elseif (! $hasChanged) {
                 return null;
             }
-        }
-
-        /** @var Arg $arg1 */
-        $arg1 = $new->args[1];
-        if ($arg1->name instanceof Identifier && $arg1->name->toString() === 'previous') {
-            if ($this->hasCodeParameter($new->class)) {
-                $new->args[1] = new Arg(
-                    new MethodCall($caughtThrowableVariable, 'getCode'),
-                    name: $shouldUseNamedArguments ? new Identifier('code') : null
+        } else {
+            /** @var Arg $arg1 */
+            $arg1 = $new->args[1];
+            if ($arg1->name instanceof Identifier && $arg1->name->toString() === 'previous') {
+                if ($this->hasCodeParameter($new->class)) {
+                    $new->args[1] = new Arg(
+                        new MethodCall($caughtThrowableVariable, 'getCode'),
+                        name: $shouldUseNamedArguments ? new Identifier('code') : null
+                    );
+                    $new->args[$exceptionArgumentPosition] = $arg1;
+                    $hasChanged = true;
+                } elseif (! $hasChanged) {
+                    return null;
+                }
+            } else {
+                $new->args[$exceptionArgumentPosition] = new Arg(
+                    $caughtThrowableVariable,
+                    name: $shouldUseNamedArguments ? new Identifier('previous') : null
                 );
-                $new->args[$exceptionArgumentPosition] = $arg1;
                 $hasChanged = true;
-            } elseif (! $hasChanged) {
-                return null;
             }
-        } else {
-            $new->args[$exceptionArgumentPosition] = new Arg(
-                $caughtThrowableVariable,
-                name: $shouldUseNamedArguments ? new Identifier('previous') : null
-            );
-            $hasChanged = true;
         }
 
         if (! $hasChanged) {