OSC/UCX: suppressed compilation warnings

- suppressed sing/unsign-compare warnings

Signed-off-by: Sergey Oblomov <sergeyo@mellanox.com>

ompi/mca/osc/ucx/osc_ucx_comm.c

@@ -356,7 +356,7 @@ static inline int get_dynamic_win_info(uint64_t remote_addr, ompi_osc_ucx_module
     temp_dynamic_wins = (ompi_osc_dynamic_win_info_t *)(temp_buf + sizeof(uint64_t));
     contain = ompi_osc_find_attached_region_position(temp_dynamic_wins, 0, win_count,
                                                      remote_addr, 1, &insert);
-    assert(contain >= 0 && contain < win_count);
+    assert(contain >= 0 && (uint64_t)contain < win_count);
 
     status = ucp_ep_rkey_unpack(ep, temp_dynamic_wins[contain].rkey_buffer,
                                 &((module->win_info_array[target]).rkey));

ompi/mca/osc/ucx/osc_ucx_component.c

@@ -725,7 +725,7 @@ int ompi_osc_ucx_win_attach(struct ompi_win_t *win, void *base, size_t len) {
             return ret;
         }
 
-        assert(insert_index >= 0 && insert_index < module->state.dynamic_win_count);
+        assert(insert_index >= 0 && (uint64_t)insert_index < module->state.dynamic_win_count);
 
         memmove((void *)&module->local_dynamic_win_info[insert_index+1],
                 (void *)&module->local_dynamic_win_info[insert_index],
@@ -777,7 +777,7 @@ int ompi_osc_ucx_win_detach(struct ompi_win_t *win, const void *base) {
     contain = ompi_osc_find_attached_region_position((ompi_osc_dynamic_win_info_t *)module->state.dynamic_wins,
                                                      0, (int)module->state.dynamic_win_count,
                                                      (uint64_t)base, 1, &insert);
-    assert(contain >= 0 && contain < module->state.dynamic_win_count);
+    assert(contain >= 0 && (uint64_t)contain < module->state.dynamic_win_count);
 
     /* if we can't find region - just exit */
     if (contain < 0) {