Fix crash on jack_internal_client_load without some options set

common/JackRequest.h

@@ -1063,8 +1063,12 @@ struct JackInternalClientLoadRequest : public JackRequest
         memset(fDllName, 0, sizeof(fDllName));
         memset(fLoadInitName, 0, sizeof(fLoadInitName));
         strncpy(fName, client_name, sizeof(fName)-1);
-        strncpy(fDllName, so_name, sizeof(fDllName)-1);
-        strncpy(fLoadInitName, objet_data, sizeof(fLoadInitName)-1);
+        if (so_name) {
+            strncpy(fDllName, so_name, sizeof(fDllName)-1);
+        }
+        if (objet_data) {
+            strncpy(fLoadInitName, objet_data, sizeof(fLoadInitName)-1);
+        }
     }
 
     int Read(detail::JackChannelTransactionInterface* trans)