fix warnings, oops

Found with 1.9.3

2 files changed, 2 insertions, 3 deletions

diff --git a/lib/mogilefs/backend.rb b/lib/mogilefs/backend.rb
index 7e984e5..b0d2f5b 100644
--- a/lib/mogilefs/backend.rb
+++ b/lib/mogilefs/backend.rb
@@ -164,7 +164,6 @@ class MogileFS::Backend
   # Performs the +cmd+ request with +args+.
 
   def do_request(cmd, args, idempotent = false)
-    response = nil
     request = make_request cmd, args
     @mutex.synchronize do
       begin
diff --git a/test/test_mogilefs_integration_large_pipe.rb b/test/test_mogilefs_integration_large_pipe.rb
index afc252e..49b9397 100644
--- a/test/test_mogilefs_integration_large_pipe.rb
+++ b/test/test_mogilefs_integration_large_pipe.rb
@@ -40,8 +40,8 @@ class TestMogileFSLargePipe< TestMogIntegration
     File.unlink(tmp_path)
     x!("mkfifo", tmp_path)
     pid = fork do
-      File.open(tmp_path, "wb") do |w|
-        nr.times { w.write(junk) }
+      File.open(tmp_path, "wb") do |wr|
+        nr.times { wr.write(junk) }
       end
     end
     assert_equal(nr * junk.size, @client.store_file("fifo", nil, tmp_path))