Possible memory leak in modules/libcom/src/osi/os/default/osdThreadHooks.c

In the epicsThreadHookAdd(EPICS_THREAD_HOOK_ROUTINE hook) function in modules/libcom/src/osi/os/default/osdThreadHooks.c memory is allocated for pHook. Then a mutex is calimed and if successful the hook is added to a list of hook. If th emutex fails however the memory for the pHook is not freed.

This is reported as an error by the Codacy static code analysis.

Codacy link: https://app.codacy.com/gh/epics-base/epics-base/file/42103575134/issues/source?bid=16430872&fileBranchId=16430872#l75