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engine.c: in wallscan(), fix oob of umost[] and dmost[] when x2 == xdim-1. 

Analogously treat maskwallscan() and transmaskwallscan(), although I could
not get the respective accesses to be oob, too.

git-svn-id: https://svn.eduke32.com/eduke32@4757 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
helixhorned 2014-11-22 18:37:21 +00:00
parent 7275152b86
commit e919dee00f
1 changed files with 8 additions and 4 deletions
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12
polymer/eduke32/build/src/engine.c
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@ -2790,7 +2790,7 @@ static void maskwallscan(int32_t x1, int32_t x2, int32_t saturatevplc)
x = x1;
while ((startumost[x+windowx1] > startdmost[x+windowx1]) && (x <= x2))
while ((x <= x2) && (startumost[x+windowx1] > startdmost[x+windowx1]))
x++;
p = x+frameoffset;
@ -3775,7 +3775,9 @@ static void wallscan(int32_t x1, int32_t x2,
if (globalshiftval < 0)
return;
if (x2 >= xdim) x2 = xdim-1;
if (x2 >= xdim)
x2 = xdim-1;
assert((unsigned)x1 < (unsigned)xdim);
tsiz = tilesiz[globalpicnum];
@ -3793,7 +3795,8 @@ static void wallscan(int32_t x1, int32_t x2,
x = x1;
while ((umost[x] > dmost[x]) && (x <= x2)) x++;
while ((x <= x2) && (umost[x] > dmost[x]))
x++;
#ifdef NONPOW2_YSIZE_ASM
if (globalshiftval==0)
@ -4023,7 +4026,8 @@ static void transmaskwallscan(int32_t x1, int32_t x2, int32_t saturatevplc)
setuptvlineasm(globalshiftval, saturatevplc);
x = x1;
while ((startumost[x+windowx1] > startdmost[x+windowx1]) && (x <= x2)) x++;
while ((x <= x2) && (startumost[x+windowx1] > startdmost[x+windowx1]))
x++;
#ifndef ENGINE_USING_A_C
if (globalshiftval==0)