loudmouth: fix build

Signed-off-by: W. Michael Petullo <mike@flyn.org>

libs/loudmouth/Makefile

@@ -31,7 +31,7 @@ include $(INCLUDE_DIR)/package.mk
 define Package/loudmouth
   SECTION:=libs
   CATEGORY:=Libraries
-  DEPENDS:=+glib2 +libopenssl
+  DEPENDS:=+glib2 +libopenssl +PACKAGE_krb5-libs:krb5-libs
   TITLE:=loudmouth
   URL:=https://github.com/mcabber/loudmouth
 endef

libs/loudmouth/patches/002-fix-comparison.patch

@@ -0,0 +1,12 @@
+diff -u --recursive loudmouth-1.5.3-vanilla/loudmouth/lm-sasl.c loudmouth-1.5.3/loudmouth/lm-sasl.c
+--- loudmouth-1.5.3-vanilla/loudmouth/lm-sasl.c	2018-07-27 22:42:03.250616281 -0400
++++ loudmouth-1.5.3/loudmouth/lm-sasl.c	2018-07-27 22:42:26.756659723 -0400
+@@ -529,7 +529,7 @@
+     }
+ 
+     nonce = g_hash_table_lookup (challenge, "nonce");
+-    if (nonce == NULL || nonce == '\0') {
++    if (nonce == NULL || *nonce == '\0') {
+         g_log (LM_LOG_DOMAIN, LM_LOG_LEVEL_SASL,
+                "%s: server didn't provide a nonce in the challenge",
+                G_STRFUNC);