twain_32: Return TWRC_FAILURE/TWCC_NODS when we have no sources.

dlls/twain_32/dsm_ctrl.c

@@ -169,8 +169,8 @@ TW_UINT16 TWAIN_IdentityGetFirst (pTW_IDENTITY pOrigin, TW_MEMREF pData)
 	twain_autodetect();
 	if (!nrdevices) {
 		TRACE ("no entries found.\n");
-		DSM_twCC = TWCC_SUCCESS;
-		return TWRC_ENDOFLIST;
+		DSM_twCC = TWCC_NODS;
+		return TWRC_FAILURE;
 	}
 	DSM_currentDevice = 0;
 	*pSourceIdentity = devices[DSM_currentDevice++].identity;

dlls/twain_32/tests/dsm.c

@@ -150,12 +150,9 @@ static void test_sources(TW_IDENTITY *appid)
     memset(&source, 0, sizeof(source));
     rc = pDSM_Entry(appid, NULL, DG_CONTROL, DAT_IDENTITY, MSG_GETFIRST, &source);
     get_condition_code(appid, NULL, &status);
-    todo_wine
-    ok(rc == TWRC_SUCCESS || rc == TWRC_FAILURE, "Get first error code, rc %d, cc %d\n", rc, status.ConditionCode);
-    if (rc == TWRC_SUCCESS)
-        ok(status.ConditionCode == TWCC_SUCCESS,"Get first invalid condition code, rc %d, cc %d\n", rc, status.ConditionCode);
-    if (rc == TWRC_FAILURE)
-        ok(status.ConditionCode == TWCC_NODS,"Get first invalid condition code, rc %d, cc %d\n", rc, status.ConditionCode);
+    ok( (rc == TWRC_SUCCESS && status.ConditionCode == TWCC_SUCCESS) ||
+        (rc == TWRC_FAILURE && status.ConditionCode == TWCC_NODS),
+            "Get first invalid condition code, rc %d, cc %d\n", rc, status.ConditionCode);
 
     while (rc == TWRC_SUCCESS)
     {