fix mistypes, spaces and tabs

Change-Id: I651473f638365bbd333c4c80d223cdd023dd2c51
diff --git a/openbsc/src/libbsc/chan_alloc.c b/openbsc/src/libbsc/chan_alloc.c
index 7b0c3e6..367139c 100644
--- a/openbsc/src/libbsc/chan_alloc.c
+++ b/openbsc/src/libbsc/chan_alloc.c
@@ -303,7 +303,7 @@
 		}
 		break;
 	case GSM_LCHAN_TCH_H:
-		lchan =_lc_find_bts(bts, GSM_PCHAN_TCH_H);
+		lchan = _lc_find_bts(bts, GSM_PCHAN_TCH_H);
 		/* If we don't have TCH/H available, fall-back to TCH/F */
 		if (!lchan) {
 			lchan = _lc_find_bts(bts, GSM_PCHAN_TCH_F);