weechat 0.3.9.2

- Upgrade to 0.3.9.2.  Still works with superenv.

Closes Homebrew/homebrew#16152.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Formula/weechat.rb

@@ -2,8 +2,8 @@ require 'formula'
 
 class Weechat < Formula
   homepage 'http://www.weechat.org'
-  url 'http://www.weechat.org/files/src/weechat-0.3.9.1.tar.bz2'
-  sha1 'f7b9d04ed40a36ecbc3d624affcc82cce966b14a'
+  url 'http://www.weechat.org/files/src/weechat-0.3.9.2.tar.bz2'
+  sha1 '64147c88426c240d5d33c65755c729ed2c435aeb'
 
   depends_on 'cmake' => :build
   depends_on 'gettext'
@@ -52,10 +52,12 @@ class Weechat < Formula
     args << '-DENABLE_ASPELL=OFF' unless build.include? 'aspell'
     args << '-DENABLE_GUILE=OFF'  unless build.include? 'guile' and \
                                          Formula.factory('guile').linked_keg.exist?
-    args << '.'
+    args << '..'
 
-    system 'cmake', *args
-    system 'make install'
+    mkdir 'build' do
+      system 'cmake', *args
+      system 'make install'
+    end
   end
 
   def caveats; <<-EOS.undent