[xmlrpc-c] Coverity 1024180, 1024205, 1024301, 1024847, 1024848, 1024377, 1024378, 1024379, 1024380, 1024381, 1024584, 1024495, 1214208 fixes. #490

Job	Run time
Get Nonce for token	4s
Preconfig	1s
Issue temporary token	2s
DEB-PUBLIC (debian, bookworm, amd64, ubuntu-latest, unstable) / build-and-distribute	17m 8s
DEB-PUBLIC (debian, bookworm, arm32v7, ubuntu-24.04-arm, unstable) / build-and-distribute	19m 6s
DEB-PUBLIC (debian, bullseye, arm64v8, ubuntu-24.04-arm, unstable) / build-and-distribute	16m 44s
DEB-PUBLIC (debian, bullseye, arm64v8, ubuntu-24.04-arm, unstable) / meta-repo	0s
DEB-PUBLIC (debian, bookworm, amd64, ubuntu-latest, unstable) / meta-repo	0s
DEB-PUBLIC (debian, bookworm, arm32v7, ubuntu-24.04-arm, unstable) / meta-repo	0s
Revoke temporary token	2s
Publish build data to meta-repo	0s
	53m 7s

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