adsldp: Improve IDirectorySearch::GetNextRow() end of entries detection logic.

dlls/adsldp/adsldp.c

@@ -1211,11 +1211,9 @@ static HRESULT WINAPI search_GetFirstRow(IDirectorySearch *iface, ADS_SEARCH_HAN
 
     if (!res) return E_ADS_BAD_PARAMETER;
 
-    ldap_ctx->count = ldap_count_entries(ldap->ld, ldap_ctx->res);
-    ldap_ctx->pos = 0;
-    ldap_ctx->entry = ldap_first_entry(ldap->ld, ldap_ctx->res);
+    ldap_ctx->entry = NULL;
 
-    return ldap_ctx->entry ? S_OK : S_ADS_NOMORE_ROWS;
+    return IDirectorySearch_GetNextRow(iface, res);
 }
 
 static HRESULT WINAPI search_GetNextRow(IDirectorySearch *iface, ADS_SEARCH_HANDLE res)
@@ -1233,6 +1231,10 @@ static HRESULT WINAPI search_GetNextRow(IDirectorySearch *iface, ADS_SEARCH_HAND
     {
         ldap_ctx->count = ldap_count_entries(ldap->ld, ldap_ctx->res);
         ldap_ctx->pos = 0;
+
+        if (ldap_ctx->pos >= ldap_ctx->count)
+            return S_ADS_NOMORE_ROWS;
+
         ldap_ctx->entry = ldap_first_entry(ldap->ld, ldap_ctx->res);
     }
     else
@@ -1241,10 +1243,14 @@ static HRESULT WINAPI search_GetNextRow(IDirectorySearch *iface, ADS_SEARCH_HAND
             return S_ADS_NOMORE_ROWS;
 
         ldap_ctx->entry = ldap_next_entry(ldap->ld, ldap_ctx->res);
-        ldap_ctx->pos++;
     }
 
-    return ldap_ctx->entry ? S_OK : S_ADS_NOMORE_ROWS;
+    if (!ldap_ctx->entry)
+        return S_ADS_NOMORE_ROWS;
+
+    ldap_ctx->pos++;
+
+    return S_OK;
 }
 
 static HRESULT WINAPI search_GetPreviousRow(IDirectorySearch *iface, ADS_SEARCH_HANDLE res)