Author: Himangi Saraogi <himangi774@gmail.com> This patch fixes the following sparse warnings: drivers/staging/vt6655/wmgr.c:970:42: warning: Using plain integer as NULL pointer drivers/staging/vt6655/wmgr.c:971:41: warning: Using plain integer as NULL pointer drivers/staging/vt6655/wmgr.c:972:38: warning: Using plain integer as NULL pointer drivers/staging/vt6655/wmgr.c:973:43: warning: Using plain integer as NULL pointer drivers/staging/vt6655/wmgr.c:4110:37: warning: Using plain integer as NULL pointer drivers/staging/vt6655/wmgr.c:4111:41: warning: Using plain …