6986968: Crash on XIM server restart

Summary: Free XIM data structures on DestroyXIMCallback
Reviewed-by: naoto

src/solaris/native/sun/awt/awt_InputMethod.c

@@ -1473,6 +1473,10 @@ static void OpenXIMCallback(Display *display, XPointer client_data, XPointer cal
 static void DestroyXIMCallback(XIM im, XPointer client_data, XPointer call_data) {
     /* mark that XIM server was destroyed */
     X11im = NULL;
+    JNIEnv* env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
+    /* free the old pX11IMData and set it to null. this also avoids crashing
+     * the jvm if the XIM server reappears */
+    X11InputMethodData *pX11IMData = getX11InputMethodData(env, currentX11InputMethodInstance);
 }
 
 /*