When stdio buffering is disabled, fgetc/getchar on stdin always returned EOF
because fs_cookie and fs_oflags were left uninitialized and lib_fread_unlocked
bails out on (fs_oflags & O_RDOK) == 0.
Fix this by moving the initialization of the fs_cookie and fs_oflags outside the
CONFIG check; these fields need to be initialized regardless of
CONFIG_STDIO_DISABLE_BUFFERING.
In addition, initializing stream[i].fs_iofunc pointers to NULL is redundant
since the task group is allocated with kmm_zalloc/group_zalloc. Zero
allocation was already assumed on fs_flags, so remove the unnecessary code.
Signed-off-by: Jukka Laitinen <jukka.laitinen@tii.ae>
1563462c06