=== modified file 'adler32.c'
--- adler32.c	2011-03-15 00:26:32 +0000
+++ adler32.c	2011-03-15 20:46:10 +0000
@@ -36,6 +36,7 @@
 #endif
 
 #define DIV_ROUNDUP(a, b) (((a) + (b) - 1) / (b))
+#define ALIGN_DIFF(x, n) (((intptr_t)((x)+(n) - 1L) & ~((intptr_t)(n) - 1L)) - (intptr_t)(x))
 #define ALIGN_DOWN(x, n) (((intptr_t)(x)) & ~((intptr_t)(n) - 1L))
 #define ALIGN_DOWN_DIFF(x, n) (((intptr_t)(x)) & ((intptr_t)(n) - 1L))