tree schema: BUGFIX: strncmp() use fixed
tree schema: BUGFIX: strncmp() use fixed

After strncmp() success, the next char
must be also compared to make sure it is
a match.

PavolVican/libyang,PavolVican/libyang,PavolVican/libyang,lukasmacko/libyang,PavolVican/libyang,lukasmacko/libyang,PavolVican/libyang