Fix va_end arg in formatting security exception

CID 304494

Signed-off-by: Erik Boasson <eb@ilities.com>

src/security/core/src/dds_security_utils.c

@@ -782,7 +782,7 @@ void DDS_Security_Exception_vset (DDS_Security_SecurityException *ex, const char
     }
   }
 
-  va_end(args1);
+  va_end(args2);
 
   ex->message = str;
   ex->code = code;