find variable with 'psz_Name' in the current branch of 'p_Cfg'. this
function only inspects the current branch, it will neither walk
up nor down the tree.
defined in 'cconfig.c'
Parameters:
p_Cfg -
a valid pointer to a t_config - psz_Name
the name of the variable to find
Returns:
0
not found
1
found
Preconditions:
p_Cfg must be valid or this function will simply do nothing
p_Cfg->n_Error must be CFGERROR_OK or this
function will simply do nothing