fbdev: fix integer as NULL pointer warning

drivers/video/aty/atyfb_base.c:3359:26: warning: Using plain integer as NULL pointer
drivers/video/aty/radeon_base.c:2280:32: warning: Using plain integer as NULL pointer
drivers/video/matrox/matroxfb_base.h:203:25: warning: Using plain integer as NULL pointer
drivers/video/matrox/matroxfb_base.h:203:25: warning: Using plain integer as NULL pointer
drivers/video/sis/sis_main.c:5790:44: warning: Using plain integer as NULL pointer

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/video/aty/radeon_base.c b/drivers/video/aty/radeon_base.c
index 72cd0d2f14ec..400e9264e456 100644
--- a/drivers/video/aty/radeon_base.c
+++ b/drivers/video/aty/radeon_base.c
@@ -2277,8 +2277,8 @@ static int __devinit radeonfb_pci_register (struct pci_dev *pdev,
         do {
                 rinfo->fb_base = ioremap (rinfo->fb_base_phys,
                                           rinfo->mapped_vram);
-        } while (   rinfo->fb_base == 0 &&
-                  ((rinfo->mapped_vram /=2) >= MIN_MAPPED_VRAM) );
+        } while (rinfo->fb_base == NULL &&
+                 ((rinfo->mapped_vram /= 2) >= MIN_MAPPED_VRAM));
 
         if (rinfo->fb_base == NULL) {
                 printk (KERN_ERR "radeonfb (%s): cannot map FB\n",