wbuf: remove tmpdir parameter

We can retrieve it when we actually need to create the
temporary file.  This saves an ivar slot and method dispatch
parameters.

This patch is nice, unfortunately the patch which follows is
not :P

1 files changed, 2 insertions, 3 deletions

diff --git a/lib/yahns/wbuf.rb b/lib/yahns/wbuf.rb
index 1010c86..583df10 100644
--- a/lib/yahns/wbuf.rb
+++ b/lib/yahns/wbuf.rb
@@ -32,9 +32,8 @@ class Yahns::Wbuf # :nodoc:
   include Yahns::WbufCommon
   attr_reader :busy
 
-  def initialize(body, persist, tmpdir)
+  def initialize(body, persist)
     @tmpio = nil
-    @tmpdir = tmpdir
     @sf_offset = @sf_count = 0
     @wbuf_persist = persist # whether or not we keep the connection alive
     @body = body # something we call #close on when done writing
@@ -58,7 +57,7 @@ class Yahns::Wbuf # :nodoc:
       @busy = rv
     end until @busy
 
-    @tmpio ||= Yahns::TmpIO.new(@tmpdir)
+    @tmpio ||= Yahns::TmpIO.new(c.class.output_buffer_tmpdir)
     @sf_count += String === buf ? @tmpio.write(buf) : wbuf_writev(buf)
 
     # we spent some time copying to the FS, try to write to