base: make CUSTOM_ALIGN use uintptr_t

For cases where long is shorter than ptr.

diff --git a/usual/base.h b/usual/base.h
index e14d09a2f13354cd15e7ac82bfe0fee62daa52d9..36eb359987b9ae5ef12fac60ec96d9e512d8c4a7 100644 (file)
--- a/usual/base.h
+++ b/usual/base.h
@@ -69,7 +69,7 @@
 
 /** power-of-2 alignment */
 #ifndef CUSTOM_ALIGN
-#define CUSTOM_ALIGN(x, a) (((unsigned long)(x) + (a) - 1) & ~((a) - 1))
+#define CUSTOM_ALIGN(x, a) (((uintptr_t)(x) + (uintptr_t)(a) - 1) & ~((uintptr_t)(a) - 1))
 #endif
 
 /** preferred alignment */