Fix problem with shifting in gsroprun.c. I had systematically got this

wrong throughout the code, but fixed it everywhere except this one
case in an earlier commit. This completes the fix.

No cluster changes expected.

git-svn-id: http://svn.ghostscript.com/ghostscript/trunk@12113 a1074d23-0009-0410-80fe-cf8c14f379e6

1 files changed, 3 insertions, 2 deletions

diff --git a/gs/base/gsroprun.c b/gs/base/gsroprun.c
index a6aec309f..adb6db8e7 100644
--- a/gs/base/gsroprun.c
+++ b/gs/base/gsroprun.c
@@ -688,11 +688,12 @@ static void generic_rop_run8_const_s_1bit(rop_run_op *op, byte *d, int len)
         if (troll == 0)
             T = *t++;
         else {
-            if (--troll == 0) {
+            --troll;
+            T = tcolors[(*t >> troll) & 1];
+            if (troll == 0) {
                 troll = 8;
                 t++;
             }
-            T = tcolors[(*t >> troll) & 1];
         }
         if ((T != ttrans))
             *d = proc(*d, S, T);