zzip: fseeko: do not redefine `PAGESIZE`

If we've already pulled in the `PAGESIZE` macro via some transitive
headers, we don't want to redefine its value.

diff --git a/zzip/fseeko.c b/zzip/fseeko.c
index f89569060a6c547d5c412f35086c2bc88c550610..ac66784a6d4b349521a0d62fbba2741cfea7ed7d 100644 (file)
--- a/zzip/fseeko.c
+++ b/zzip/fseeko.c
@@ -76,7 +76,9 @@
 
 /* we try to round all seeks to the pagesize - since we do not use
  * the sys/mmap interface we have to guess a good value here: */
-#define PAGESIZE 8192
+#ifndef PAGESIZE
+# define PAGESIZE 8192
+#endif
 
 #ifdef DEBUG
 #define debug1(msg) do { fprintf(stderr, "DEBUG: %s : " msg "\n", __func__); } while(0)