Tweak call to plugin_push_current() in svn_call()
Created by: bright-tools
Move the call to plugin_push_current() to be before the first call to svn_binary() to ensure that svn_binary()'s calls to plugin_config_get() retrieve the options from SourceSVN's config options rather than any plugin inheriting from SourceSVN.
Addresses issue seen in #241 (closed)