Coverity fixes related to OVMS #1573

Job	Run time
cpp-beam_search_causal_lm-notus-7b-v1	9m 58s
cpp-beam_search_causal_lm-Phi-2	8m 3s
cpp-beam_search_causal_lm-Qwen1_5-7B-Chat	9m 11s
cpp-beam_search_causal_lm-Qwen-7B-Chat	11m 22s
cpp-beam_search_causal_lm-ubuntu (./build/samples/cpp/beam_search_causal_lm/beam_search_causal_lm)	11m 27s
cpp-chat_sample-ubuntu	11m 17s
cpp-continuous-batching-macos	14m 28s
cpp-beam_search_causal_lm-ubuntu (python ./samples/python/beam_search_causal_lm/beam_search_causa...	12m 1s
cpp-continuous-batching-ubuntu	12m 1s
cpp-continuous-batching-windows	20m 56s
cpp-greedy_causal_lm-redpajama-3b-chat	12m 44s
cpp-greedy_causal_lm-windows	19m 39s
cpp-multinomial-greedy_causal_lm-ubuntu	11m 56s
cpp-Phi-1_5	10m 57s
cpp-prompt_lookup_decoding_lm-ubuntu	8m 17s
cpp-speculative_decoding_lm-ubuntu	18m 40s
	3h 22m 57s

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