(svn r1445) -Fix: reversing a train also reverses the UP and DOWN status for the

realistic acceleration calculation
-Fix: there was a big bug in setting the UP and DOWN flags making it 
easy possible for a overloaded train to go up a mountain. This is no 
longer possible. They will hang at a certain height

1 files changed, 4 insertions, 3 deletions

diff --git a/macros.h b/macros.h
index 69364cfcc..b9fa59104 100644
--- a/macros.h
+++ b/macros.h
@@ -99,9 +99,10 @@ uint SafeTileAdd(uint x, int add, const char *exp, const char *file, int line);
 
 #define PACK_PPOINT(p) PACK_POINT((p).x, (p).y)
 
-#define HASBIT(x,y) ((x) & (1 << (y)))
-#define SETBIT(x,y) ((x) |= (1 << (y)))
-#define CLRBIT(x,y) ((x) &= ~(1 << (y)))
+#define HASBIT(x,y)    ((x) &   (1 << (y)))
+#define SETBIT(x,y)    ((x) |=  (1 << (y)))
+#define CLRBIT(x,y)    ((x) &= ~(1 << (y)))
+#define TOGGLEBIT(x,y) ((x) ^=  (1 << (y)))
 
 // checking more bits. Maybe unneccessary, but easy to use
 #define HASBITS(x,y) ((x) & (y))