sqlops module: added one more sql query function return value to README

src/modules/sqlops/doc/sqlops_admin.xml

@@ -237,6 +237,10 @@ modparam("sqlops", "connect_mode", 1)
 		<para>
 			<emphasis>2</emphasis> - query successful, no rows returned
 		</para>
+		<para>
+			<emphasis>3</emphasis> - query successful, at least one row
+            returned, but result parameter was not given
+		</para>
 		</listitem>
 	</itemizedlist>
 	<section>