Fix a compiler warning.

* subversion/libsvn_subr/file.c
  (svn_file__get_max_shared_handles, set_max_shared_handles_internal,
   svn_file__set_max_shared_handles): Use an int for the capacity like we're
     using in the struct.

* subversion/include/private/svn_file.h
  (svn_file__get_max_shared_handles, svn_file__set_max_shared_handles):
    Make the declaration match the implementations.



git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1568586 13f79535-47bb-0310-9956-ffa450edef68