sh: fixup many sparse errors.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/boot/compressed/misc_32.c b/arch/sh/boot/compressed/misc_32.c
index f386997..efdba6b 100644
--- a/arch/sh/boot/compressed/misc_32.c
+++ b/arch/sh/boot/compressed/misc_32.c
@@ -191,7 +191,7 @@
 
 void decompress_kernel(void)
 {
-	output_data = 0;
+	output_data = NULL;
 	output_ptr = PHYSADDR((unsigned long)&_text+PAGE_SIZE);
 #ifdef CONFIG_29BIT
 	output_ptr |= P2SEG;