test_codec_support_bts_rate: add missing breaks

Fixes: 3db22c61 ("cosmetic: clarify test_codec_support_bts()")
Fixes: CID#310823
Change-Id: I951783b6310f0a6ef5546a36c962def9d6e66285

src/osmo-bsc/codec_pref.c

@@ -188,9 +188,11 @@ static bool test_codec_support_bts_rate(const struct gsm_bts *bts, const bool fu
 			case GSM_PCHAN_TCH_F_PDCH:
 				if (full_rate)
 					return true;
+				break;
 			case GSM_PCHAN_TCH_H:
 				if (!full_rate)
 					return true;
+				break;
 			default:
 				continue;
 			}