Author: Florian Weimer <fweimer@redhat.com>
Date:   Wed Jan 3 12:33:55 2024 +0100

    Ruby bindings: Return 0 on exceptions, not NULL
    
    At least Ruby 3.2 anf SWIG 4.1 expect an integer here, resulting in
    an int-conversion error with current/upcoming compilers.  Return 0
    instead of NULL works with pointer return types, too, should there
    be a supported Ruby version which uses a pointer in this context.

Submitted upstream: <https://github.com/MapServer/MapServer/pull/6998>

diff --git a/mapscript/ruby/rbmodule.i b/mapscript/ruby/rbmodule.i
index e5ce85e4883e3ef6..47eda59e32c704d8 100644
--- a/mapscript/ruby/rbmodule.i
+++ b/mapscript/ruby/rbmodule.i
@@ -129,7 +129,7 @@ static void _raise_ms_exception() {
             default:
                 _raise_ms_exception();
                 msResetErrorList();
-                return NULL;
+                return 0;
         }
 
     }