various comment / whitespace tweaks (libmsc, gprs, libcommon-cs)

cosmetic ws in common_cs_vty.c, osmo_msc.c

comment: tiny typo fix in gsm_04_08.c

In comments, drop some unbalanced braces, because simplistic C file harvesters
will break at a single opening brace even if it is in a comment. This is aimed
at the fsm-to-dot.py script in libosmocore/contrib.

Change-Id: I3c1fa53195a1e57d6fe0a6791c346d30ceff1251
diff --git a/openbsc/src/gprs/gprs_sndcp.c b/openbsc/src/gprs/gprs_sndcp.c
index 60455b5..a18998f 100644
--- a/openbsc/src/gprs/gprs_sndcp.c
+++ b/openbsc/src/gprs/gprs_sndcp.c
@@ -911,6 +911,7 @@
 	case LL_DATA_CONF:
 	case LL_UNITDATA_IND:
 	case LL_STATUS_IND:
+	}
 }
 #endif