Fix dangerous casts

On Windows 64-bit, the size of long is 32-bit, thus any pointer to long cast is
not valid. In any case, one should use intptr_t and ptrdiff_t when casting
to integers. This commit attempts to fix all instances reported by GCC.
When relevant, I replaced code by the macros PTR_ADD, ALIGN_UP from system.h

Change-Id: I2273b0e8465d3c4689824717ed5afa5ed238a2dc

1 files changed, 1 insertions, 1 deletions

diff --git a/apps/plugins/zxbox/z80.c b/apps/plugins/zxbox/z80.c
index f6f1de7468..683584f471 100644
--- a/apps/plugins/zxbox/z80.c
+++ b/apps/plugins/zxbox/z80.c
@@ -48,7 +48,7 @@ static byte *a64kmalloc(int num64ksegs)
     /*exit(1);*/
   }
 
-  return (byte *) (( (long) bigmem & ~((long) 0xFFFF)) + 0x10000);
+  return (byte *) (( (intptr_t) bigmem & ~((intptr_t) 0xFFFF)) + 0x10000);
 }