Fix dumpmem.c channel structure

tests/dumpmem.c

@@ -88,8 +88,8 @@ int main(int argc, char *argv[])
 
     for (i = 0; my_rig->state.chan_list[i].type && i < CHANLSTSIZ; i++)
     {
-        for (j = my_rig->state.chan_list[i].start;
+        for (j = my_rig->state.chan_list[i].startc;
-             j <= my_rig->state.chan_list[i].end; j++)
+             j <= my_rig->state.chan_list[i].endc; j++)
         {
             dump_chan(my_rig, j);
         }