Fix compile warnings
Fix compile warnings

strstr() returns a char pointer

simple_none.c: In function ‘base_len’:
simple_none.c:940:33: warning: ordered comparison of pointer with integer zero
simple_none.c:941:29: warning: ordered comparison of pointer with integer zero

Signed-off-by: Takashi Iwai <4596b3305151c7ee743192a95d394341e3d3b644@suse.de>

lgirdwood/alsa-lib,takaswie/alsa-lib,lgirdwood/alsa-lib,mikelima/alsa-lib,mikelima/alsa-lib,Distrotech/alsa-lib,mikelima/alsa-lib,tiwai/alsa-lib,mengdonglin/alsa-lib,zedongchen/alsa-lib,lgirdwood/alsa-lib,takaswie/alsa-lib,alsa-project/alsa-lib,mengdonglin/alsa-lib,mikelima/alsa-lib,zedongchen/alsa-lib,alsa-project/alsa-lib,alsa-project/alsa-lib,lgirdwood/alsa-lib,Distrotech/alsa-lib,tiwai/alsa-lib,zedongchen/alsa-lib,takaswie/alsa-lib,lgirdwood/alsa-lib,Distrotech/alsa-lib,alsa-project/alsa-lib,zedongchen/alsa-lib,takaswie/alsa-lib,mengdonglin/alsa-lib,takaswie/alsa-lib,mengdonglin/alsa-lib,tiwai/alsa-lib,tiwai/alsa-lib,mengdonglin/alsa-lib,zedongchen/alsa-lib,Distrotech/alsa-lib,mikelima/alsa-lib,Distrotech/alsa-lib