sngrep: fix ncurses wchar detection

This commit adds an upstream patch to the sngrep package that fixes the
detection of wchar capable ncurses.

Signed-off-by: Adam Duskett <aduskett@codeblue.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/sngrep/sngrep.hash

@@ -1 +1,3 @@
+# Locally computed
 sha256 7385ac202de6d6a1feffb2fd514600563133d9dfa7fb47be052de839abcc1d52 sngrep-v1.4.3.tar.gz
+sha256 a3376abe20cca95a13ee88188ba5ba50425c93afc927cca018c50b0309ad21f9  4740f3341a99eaec105dee202a6fa7828212cdf1.patch

package/sngrep/sngrep.mk

@@ -14,8 +14,15 @@ SNGREP_DEPENDENCIES = libpcap ncurses host-pkgconf
 SNGREP_CONF_ENV += \
 	$(if $(BR2_STATIC_LIBS),LIBS="`$(STAGING_DIR)/usr/bin/pcap-config --static --libs`")
 
-# our ncurses wchar support is not properly detected
+# This patch fixes ncurses wchar detection
+SNGREP_PATCH = \
+	https://github.com/irontec/sngrep/pull/191/commits/4740f3341a99eaec105dee202a6fa7828212cdf1.patch
+
+ifeq ($(BR2_PACKAGE_NCURSES_WCHAR),y)
+SNGREP_CONF_OPTS += --enable-unicode
+else
 SNGREP_CONF_OPTS += --disable-unicode
+endif
 
 # openssl and gnutls can't be enabled at the same time.
 ifeq ($(BR2_PACKAGE_OPENSSL),y)