C-Netz: Correctly synchronize time stamp of SpK to OgK

Even if the SpK is not used (yet), it must count time stamp (bit_time) so that
SpK keeps in sync with the OgK, until frames are received from mobile station.

src/cnetz/main.c

@@ -526,7 +526,7 @@ int main(int argc, char *argv[])
 
 	/* OgK must be the first channel, so it becomes master. This is required for syncing SPK channels */
 	if (i != 0) {
-		fprintf(stderr, "The first channel you defined must be OgK (control) or OgK/SPK (control/speech) channel type. Quitting!\n");
+		fprintf(stderr, "The first channel you define must be OgK (control) or OgK/SPK (control/speech) channel type. Quitting!\n");
 		goto fail;
 	}