weechat: Backport fix for freeze with gnutls 3.2.

Fixes /exit when using gnutls 3.2. This is a temporary solution as 3.1
isn't building right now. The next release of weechat will include this
fix.

pkgs/applications/networking/irc/weechat/default.nix

@@ -17,6 +17,13 @@ stdenv.mkDerivation rec {
       cacert cmake
     ];
 
+  # This patch is based on
+  # weechat/c324610226cef15ecfb1235113c8243b068084c8. It fixes
+  # freeze/crash on /exit when using nixpkgs' gnutls 3.2. The next
+  # weechat release (0.4.4) will include this, so it's safe to remove
+  # then.
+  patches = [ ./fix-gnutls-32.diff ];
+
   postInstall = ''
        wrapProgram "$out/bin/weechat" \
          --prefix PYTHONPATH : "$PYTHONPATH" \

pkgs/applications/networking/irc/weechat/fix-gnutls-32.diff

@@ -0,0 +1,16 @@
+diff --git a/src/gui/curses/CMakeLists.txt b/src/gui/curses/CMakeLists.txt
+index 325c611..a8927bc 100644
+--- a/src/gui/curses/CMakeLists.txt
++++ b/src/gui/curses/CMakeLists.txt
+@@ -53,9 +53,7 @@ IF(${CMAKE_SYSTEM_NAME} STREQUAL "FreeBSD")
+   ENDIF(HAVE_BACKTRACE)
+ ENDIF(${CMAKE_SYSTEM_NAME} STREQUAL "FreeBSD")
+ 
+-IF(${CMAKE_SYSTEM_NAME} STREQUAL "OpenBSD")
+-  LIST(APPEND EXTRA_LIBS "pthread")
+-ENDIF(${CMAKE_SYSTEM_NAME} STREQUAL "OpenBSD")
++LIST(APPEND EXTRA_LIBS "pthread")
+ 
+ IF(ICONV_LIBRARY)
+   LIST(APPEND EXTRA_LIBS ${ICONV_LIBRARY})
+

pkgs/top-level/all-packages.nix

@@ -9215,10 +9215,7 @@ let
     graphicsSupport = false;
   };
 
-  weechat = callPackage ../applications/networking/irc/weechat {
-    # weechat doesn't exit with gnutls32. Use 3.1 for now.
-    gnutls = gnutls31;
-  };
+  weechat = callPackage ../applications/networking/irc/weechat { };
 
   weston = callPackage ../applications/window-managers/weston { };