Fix order-of-evaluation issue in xc_domain_dumpcore. The intent is
to move blocks of memory 4096 pages at a time, and a buffer is
allocated for this. Unfortunately, the #define is without
parentheses and %/* are the same order and evaluated left to right.
Result: very big buffer being used 4 pages at a time.

Signed-off-by: Ben Thomas (bthomas@virtualiron.com)

     1.1 --- a/tools/libxc/xc_core.c	Thu Mar 09 00:45:40 2006 +0100
     1.2 +++ b/tools/libxc/xc_core.c	Thu Mar 09 11:16:46 2006 +0100
     1.3 @@ -6,7 +6,7 @@
     1.4  #include <zlib.h>
     1.5  
     1.6  /* number of pages to write at a time */
     1.7 -#define DUMP_INCREMENT 4 * 1024
     1.8 +#define DUMP_INCREMENT (4 * 1024)
     1.9  #define round_pgup(_p)    (((_p)+(PAGE_SIZE-1))&PAGE_MASK)
    1.10  
    1.11  static int