imm32: ImmConfigureIME should return 0 when the type is IME_CONFIG_REGISTERWORD and the data is NULL.

dlls/imm32/imm.c

diff --git a/dlls/imm32/imm.c b/dlls/imm32/imm.c
index abcff55..2c9489a 100644
--- a/dlls/imm32/imm.c
+++ b/dlls/imm32/imm.c
@@ -513,6 +513,9 @@
 
     TRACE("(%p, %p, %d, %p):\n", hKL, hWnd, dwMode, lpData);
 
+    if (dwMode == IME_CONFIG_REGISTERWORD && !lpData)
+        return FALSE;
+
     if (immHkl->hIME && immHkl->pImeConfigure)
     {
         if (dwMode != IME_CONFIG_REGISTERWORD || !is_kbd_ime_unicode(immHkl))
@@ -545,6 +548,9 @@
 
     TRACE("(%p, %p, %d, %p):\n", hKL, hWnd, dwMode, lpData);
 
+    if (dwMode == IME_CONFIG_REGISTERWORD && !lpData)
+        return FALSE;
+
     if (immHkl->hIME && immHkl->pImeConfigure)
     {
         if (dwMode != IME_CONFIG_REGISTERWORD || is_kbd_ime_unicode(immHkl))

dlls/imm32/tests/imm32.c

diff --git a/dlls/imm32/tests/imm32.c b/dlls/imm32/tests/imm32.c
index 7208092..29ac553 100644
--- a/dlls/imm32/tests/imm32.c
+++ b/dlls/imm32/tests/imm32.c
@@ -254,11 +254,29 @@
     return 0;
 }
 
+static int test_ImmIME(void)
+{
+    HIMC imc;
+
+    imc = ImmGetContext(hwnd);
+    if (imc)
+    {
+        BOOL rc;
+        rc = ImmConfigureIMEA(imc, NULL, IME_CONFIG_REGISTERWORD, NULL);
+        ok (rc == 0, "ImmConfigureIMEA did not fail\n");
+        rc = ImmConfigureIMEW(imc, NULL, IME_CONFIG_REGISTERWORD, NULL);
+        ok (rc == 0, "ImmConfigureIMEW did not fail\n");
+    }
+    ImmReleaseContext(hwnd,imc);
+    return 0;
+}
+
 START_TEST(imm32) {
     if (init())
     {
         test_ImmNotifyIME();
         test_ImmGetCompositionString();
+        test_ImmIME();
     }
     cleanup();
 }