fix(nimble): Dynamic services fixes #100
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When no non-dynamic services have been added the ble_gatts_clt_cfg_pool is empty. Because of this, it reports having no free blocks, as if it was full. We must check if there are any blocks available at all, in case they are all stored in dynamic services.
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Description
I have identified two issues that occur when using only dynamic services:
ble_gatts_get_last_cfgis used which may initially returnNULLif there are no static services - this needs to be checked.ble_gatts_conn_can_allocmay wrongly returnfalsebecause there are no free blocks in theble_gatts_clt_cfg_pool, which is empty due to there being no static services.Checklist
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