Fix race in C++ demo where num_txs_broadcasted ++s before =0s
[ldk-c-bindings] / lightning-c-bindings / src / lightning /
drwxr-xr-x   ..
drwxr-xr-x - chain
drwxr-xr-x - ln
-rw-r--r-- 1304 mod.rs
drwxr-xr-x - routing
drwxr-xr-x - util