wshom.ocx/tests: Fix an ok() message so it actually dumps the invalid iid.

[Francois Gouget]

---
 dlls/wshom.ocx/tests/wshom.c |   21 ++++++++++++++++++++-
 1 files changed, 20 insertions(+), 1 deletions(-)

diff --git a/dlls/wshom.ocx/tests/wshom.c b/dlls/wshom.ocx/tests/wshom.c
index 414378f..3f5e615 100644
--- a/dlls/wshom.ocx/tests/wshom.c
+++ b/dlls/wshom.ocx/tests/wshom.c
@@ -19,6 +19,8 @@
 #define COBJMACROS
 #define CONST_VTABLE
 
+#include <stdio.h>
+
 #include <initguid.h>
 #include <ole2.h>
 #include <dispex.h>
@@ -26,6 +28,23 @@
 #include "wshom.h"
 #include "wine/test.h"
 
+
+static const char *debugstr_guid(REFIID riid)
+{
+    static char buf[50];
+
+    if(!riid)
+        return "(null)";
+
+    sprintf(buf, "{%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X}",
+            riid->Data1, riid->Data2, riid->Data3, riid->Data4[0],
+            riid->Data4[1], riid->Data4[2], riid->Data4[3], riid->Data4[4],
+            riid->Data4[5], riid->Data4[6], riid->Data4[7]);
+
+    return buf;
+}
+
+
 #define EXPECT_HR(hr,hr_exp) \
     ok(hr == hr_exp, "got 0x%08x, expected 0x%08x\n", hr, hr_exp)
 
@@ -72,7 +91,7 @@ static void test_wshshell(void)
 
     hr = ITypeInfo_GetTypeAttr(ti, &tattr);
     EXPECT_HR(hr, S_OK);
-    ok(IsEqualIID(&tattr->guid, &IID_IWshCollection), "got \n");
+    ok(IsEqualIID(&tattr->guid, &IID_IWshCollection), "got an incorrect iid: %s\n", debugstr_guid(&tattr->guid));
     ITypeInfo_ReleaseTypeAttr(ti, tattr);
 
     IWshShell3_Release(sh3);
-- 
1.7.7.3