Python and Perl should know that off_t is integer type.

modules/modperl/modperl.i

@@ -41,6 +41,8 @@
 #define stat struct stat
 %}
 
+%apply long { off_t };
+
 %begin %{
 #include "znc/zncconfig.h"
 %}

modules/modpython/modpython.i

@@ -36,6 +36,8 @@
 using std::allocator;
 %}
 
+%apply long { off_t };
+
 %begin %{
 #include "znc/zncconfig.h"
 %}