python: idl: Fix last-id update from a monitor reply. #2310

Job	Run time
linux deb no dpdk	9m 56s
osx clang --disable-ssl	4m 33s
dpdk gcc	4m 15s
linux gcc --disable-ssl	3m 38s
linux clang --disable-ssl	3m 7s
linux gcc c99	4m 36s
linux clang c99	4m 20s
linux gcc test	12m 6s
linux clang test asan	22m 12s
linux clang test ubsan	10m 58s
linux gcc test --enable-shared	17m 14s
linux clang test --enable-shared	17m 38s
linux gcc test dpdk	11m 17s
linux clang test dpdk	12m 25s
linux gcc test -ljemalloc	10m 59s
linux clang test -ljemalloc	10m 15s
linux gcc --enable-afxdp	3m 23s
linux clang --enable-afxdp	4m 19s
linux gcc dpdk --enable-shared	5m 49s
linux clang dpdk --enable-shared	4m 26s
linux gcc dpdk-shared	3m 46s
linux clang dpdk-shared	4m 27s
linux gcc dpdk-shared --enable-shared	6m 35s
linux clang dpdk-shared --enable-shared	4m 14s
linux gcc m32 --disable-ssl	3m 14s
	3h 19m 42s

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