debug.h/c: remove unused cruft / cosmetic tweaks

Change-Id: I9601d478763569933bcc46bf4eaaff70a9843be9
diff --git a/openbsc/src/libcommon/debug.c b/openbsc/src/libcommon/debug.c
index 51fbb93..3f3232c 100644
--- a/openbsc/src/libcommon/debug.c
+++ b/openbsc/src/libcommon/debug.c
@@ -177,8 +177,7 @@
 	},
 };
 
-static int filter_fn(const struct log_context *ctx,
-		     struct log_target *tar)
+static int filter_fn(const struct log_context *ctx, struct log_target *tar)
 {
 	const struct gsm_subscriber *subscr = ctx->ctx[LOGGING_CTX_VLR_SUBSCR];
 	const struct gprs_nsvc *nsvc = ctx->ctx[LOGGING_CTX_GB_NSVC];