imm32: Don't allow disabling other thread's IME by thread ID.

dlls/imm32/imm.c

@@ -1022,7 +1022,7 @@ BOOL WINAPI ImmDisableIME(DWORD idThread)
             DestroyWindow(to_destroy);
         }
     }
-    else
+    else if (!idThread || idThread == GetCurrentThreadId())
     {
         thread_data = IMM_GetThreadData(NULL, idThread);
         if (!thread_data) return FALSE;
@@ -1033,6 +1033,7 @@ BOOL WINAPI ImmDisableIME(DWORD idThread)
         if (to_destroy)
             DestroyWindow(to_destroy);
     }
+    else return FALSE;
     return TRUE;
 }
 

dlls/imm32/tests/imm32.c

@@ -2377,7 +2377,6 @@ static DWORD WINAPI check_not_disabled_ime_thread(void *arg)
     hwnd = CreateWindowA("static", "static", 0, 0, 0, 0, 0, 0, 0, 0, 0);
     ok(hwnd != NULL, "CreateWindow failed\n");
     def = ImmGetDefaultIMEWnd(hwnd);
-    todo_wine
     ok(def != NULL, "ImmGetDefaultIMEWnd returned %p\n", def);
     return 0;
 }
@@ -2403,7 +2402,6 @@ static void test_ImmDisableIME(void)
     thread = CreateThread(NULL, 0, check_not_disabled_ime_thread, event, 0, &tid);
     ok(thread != NULL, "CreateThread failed\n");
     r = ImmDisableIME(tid);
-    todo_wine
     ok(!r, "ImmDisableIME(tid) succeeded\n");
     SetEvent(event);
     WaitForSingleObject(thread, INFINITE);