cosmetic: msc_vlr_tests: add comment to show expected tallocs

If something changed the talloc landscape, it is hard to find out what the test
actually expected when it was written. Add the expectations in an inline
comment.

Change-Id: If92a18bb3dc24c2cf6498aa2da29266267488240
diff --git a/tests/msc_vlr/msc_vlr_tests.c b/tests/msc_vlr/msc_vlr_tests.c
index 7b1db1b..7cd869b 100644
--- a/tests/msc_vlr/msc_vlr_tests.c
+++ b/tests/msc_vlr/msc_vlr_tests.c
@@ -664,6 +664,19 @@
 void check_talloc(void *msgb_ctx, void *tall_bsc_ctx, int expected_blocks)
 {
 	talloc_report_full(msgb_ctx, stderr);
+	/* Expecting these to stick around in tall_bsc_ctx:
+full talloc report on 'msgb' (total      0 bytes in   1 blocks)
+talloc_total_blocks(tall_bsc_ctx) == 9
+full talloc report on 'subscr_conn_test_ctx' (total   2658 bytes in   9 blocks)
+    struct gsup_client             contains    248 bytes in   1 blocks (ref 0) 0x61300000dee0
+    struct gsm_network             contains   2410 bytes in   6 blocks (ref 0) 0x61700000fce0
+        struct vlr_instance            contains    160 bytes in   1 blocks (ref 0) 0x611000009a60
+        no_gsup_server                 contains     15 bytes in   1 blocks (ref 0) 0x60b00000ade0
+        ../../../src/libosmocore/src/rate_ctr.c:199 contains   1552 bytes in   1 blocks (ref 0) 0x61b00001eae0
+        struct llist_head              contains     16 bytes in   1 blocks (ref 0) 0x60b00000ae90
+        .*                             contains      3 bytes in   1 blocks (ref 0) 0x60b00000af40
+    msgb                           contains      0 bytes in   1 blocks (ref 0) 0x60800000bf80
+	*/
 	fprintf(stderr, "talloc_total_blocks(tall_bsc_ctx) == %zu\n",
 		talloc_total_blocks(tall_bsc_ctx));
 	if (talloc_total_blocks(tall_bsc_ctx) != expected_blocks)