Fix bug in Python bindings
Fix bug in Python bindings

Was using an undefined variable in an application error path left over from:
    commit 2cb7f6fb6e212395a8a4a6f8b2f5c325fed5b2c7
    Author: Diego Ongaro <ongaro@cs.stanford.edu>
    Date:   Sat Jan 30 19:25:54 2010 -0800
    Change conditional operations to be more general

alexandermerritt/ramcloud,matrix207/RAMCloud,taschik/ramcloud-load-manager,utah-scs/RAMCloud,utah-scs/RAMCloud,jblomer/ramcloud,anirajk/RAMCloud,mrdiegoa/ramcloud,SMatsushi/RAMCloud,taschik/ramcloud-load-manager,rstutsman/RAMCloud,matrix207/RAMCloud,anirajk/RAMCloud,IMCG/RamCloud,QingkaiLu/RAMCloud,behnamm/cs244b_project,SMatsushi/RAMCloud,matrix207/RAMCloud,taschik/ramcloud-load-manager,taschik/ramcloud,Frank-Wu/RamCloud,Frank-Wu/RamCloud,matrix207/RAMCloud,utah-scs/RAMCloud,QingkaiLu/RAMCloud,DavidLi2010/ramcloud,rstutsman/RAMCloud,utah-scs/RAMCloud,y-higuchi/ramcloud,taschik/ramcloud,SMatsushi/RAMCloud,taschik/ramcloud-load-manager,DavidLi2010/ramcloud,matrix207/RAMCloud,anirajk/RAMCloud,jblomer/ramcloud,Frank-Wu/RamCloud,taschik/ramcloud,utah-scs/RAMCloud,alexandermerritt/ramcloud,jcarreira/ramcloud,behnamm/cs244b_project,Frank-Wu/RamCloud,jblomer/ramcloud,DavidLi2010/ramcloud,behnamm/cs244b_project,DavidLi2010/ramcloud,rstutsman/RAMCloud,rstutsman/RAMCloud,jcarreira/ramcloud,DavidLi2010/ramcloud,anirajk/RAMCloud,y-higuchi/ramcloud,jcarreira/ramcloud,jcarreira/ramcloud,jblomer/ramcloud,QingkaiLu/RAMCloud,DavidLi2010/ramcloud,anirajk/RAMCloud,mrdiegoa/ramcloud,y-higuchi/ramcloud,IMCG/RamCloud,SMatsushi/RAMCloud,mrdiegoa/ramcloud,behnamm/cs244b_project,jblomer/ramcloud,alexandermerritt/ramcloud,mrdiegoa/ramcloud,mrdiegoa/ramcloud,alexandermerritt/ramcloud,taschik/ramcloud,SMatsushi/RAMCloud,jcarreira/ramcloud,taschik/ramcloud-load-manager,jcarreira/ramcloud,behnamm/cs244b_project,y-higuchi/ramcloud,Frank-Wu/RamCloud,QingkaiLu/RAMCloud,IMCG/RamCloud,IMCG/RamCloud,jblomer/ramcloud,IMCG/RamCloud,QingkaiLu/RAMCloud,anirajk/RAMCloud,taschik/ramcloud,matrix207/RAMCloud,y-higuchi/ramcloud,utah-scs/RAMCloud,alexandermerritt/ramcloud,behnamm/cs244b_project,SMatsushi/RAMCloud,QingkaiLu/RAMCloud,IMCG/RamCloud,mrdiegoa/ramcloud,rstutsman/RAMCloud,rstutsman/RAMCloud,Frank-Wu/RamCloud,alexandermerritt/ramcloud,y-higuchi/ramcloud