Always initialize file descriptor in OS_OpenCreate

[skliper]

Is your feature request related to a problem? Please describe.
Numerous false alarms on possible uninitialized variable with OS_OpenCreate use.

Describe the solution you'd like
Initialize the file descriptor to OS_OBJECT_ID_UNDEFINED:

osal/src/os/shared/src/osapi-file.c

Lines 106 to 115 in 98a2516

	int32 OS_OpenCreate(osal_id_t *filedes, const char *path, int32 flags, int32 access)
	{
	int32 return_code;
	char local_path[OS_MAX_LOCAL_PATH_LEN];
	OS_object_token_t token;
	OS_stream_internal_record_t *stream;
	/* Check parameters */
	OS_CHECK_POINTER(filedes);

Describe alternatives you've considered
Could initialize before passing in from each call, but this would provide consistency

Additional context
Static analysis warnings (on use)

Requester Info
Jacob Hageman - NASA/GSFC