Use the correct context when re-using a cached NodePath (#12331)

packages/babel-plugin-transform-modules-systemjs/test/fixtures/regression/issue-12329/input.mjs

@@ -0,0 +1,5 @@
+let Vec3;
+
+export class Light {
+    _color = Vec3;
+}

packages/babel-plugin-transform-modules-systemjs/test/fixtures/regression/issue-12329/options.json

@@ -0,0 +1,6 @@
+{
+  "plugins": [
+    "transform-modules-systemjs",
+    "proposal-class-properties"
+  ]
+}

packages/babel-plugin-transform-modules-systemjs/test/fixtures/regression/issue-12329/output.mjs

@@ -0,0 +1,21 @@
+System.register([], function (_export, _context) {
+  "use strict";
+
+  var Light, Vec3;
+
+  function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+
+  _export("Light", void 0);
+
+  return {
+    setters: [],
+    execute: function () {
+      _export("Light", Light = class Light {
+        constructor() {
+          _defineProperty(this, "_color", Vec3);
+        }
+
+      });
+    }
+  };
+});