doc/man/misc_conv.3.xml: Fix return value of misc_conv
<funcsynopsis id="misc_conv-synopsis">
<funcsynopsisinfo>#include <security/pam_misc.h></funcsynopsisinfo>
<funcprototype>
- <funcdef>void <function>misc_conv</function></funcdef>
+ <funcdef>int <function>misc_conv</function></funcdef>
<paramdef>int <parameter>num_msg</parameter></paramdef>
<paramdef>const struct pam_message **<parameter>msgm</parameter></paramdef>
<paramdef>struct pam_response **<parameter>response</parameter></paramdef>