newsboat: attempt to fix stack corruption error

Issue: https://github.com/termux/termux-packages/issues/4334

packages/newsboat/build.sh

@@ -2,6 +2,7 @@ TERMUX_PKG_HOMEPAGE=https://newsboat.org/
 TERMUX_PKG_DESCRIPTION="RSS/Atom feed reader for the text console"
 TERMUX_PKG_LICENSE="MIT"
 TERMUX_PKG_VERSION=2.17
+TERMUX_PKG_REVISION=1
 TERMUX_PKG_SRCURL=https://newsboat.org/releases/${TERMUX_PKG_VERSION}/newsboat-${TERMUX_PKG_VERSION}.tar.xz
 TERMUX_PKG_SHA256=88c3f73b676f5fc52a0c935922eb520b463b388c7ef2325e67d847bee41efa79
 TERMUX_PKG_DEPENDS="libc++, libiconv, libandroid-support, libandroid-glob, json-c, libsqlite, libcurl, libxml2, stfl, ncurses, openssl"

packages/newsboat/mbc-buffer-length-fix.patch

@@ -0,0 +1,12 @@
+diff -uNr newsboat-2.17/src/tagsouppullparser.cpp newsboat-2.17.mod/src/tagsouppullparser.cpp
+--- newsboat-2.17/src/tagsouppullparser.cpp	2019-09-22 17:19:19.000000000 +0300
++++ newsboat-2.17.mod/src/tagsouppullparser.cpp	2019-09-24 21:48:19.762987918 +0300
+@@ -515,7 +515,7 @@
+ 	} else {
+ 		for (unsigned int i = 0; entity_table[i].entity; ++i) {
+ 			if (s == entity_table[i].entity) {
+-				char mbc[MB_CUR_MAX];
++				char mbc[16];
+ 				int pos = wctomb(mbc, entity_table[i].value);
+ 				if (pos == -1) {
+ 					return std::string();