Fix parsing bug of FRC castling

The code that was supposed to intercept castling when no rights existed
in FRC was not adapted to the new encoding for this by NoRights, rather
than -1, and furthermore returned 0 (= EndOfFile) rather than
ImpossibleMove. Not sure if the former would manifest itself in any
way, but the latter seems bad.

diff --git a/parser.l b/parser.l
index 392b5b2..9515fea 100644 (file)
--- a/parser.l
+++ b/parser.l
@@ -756,7 +756,7 @@ extern void CopyBoard P((Board to, Board from));
         {
           fprintf(debugFP, "Parser FRC long %d %d\n", ff, ft);
         };
-        if(ff < 0 || ft < 0) return 0;
+        if(ff == NoRights || ft == NoRights) return 0;
     }
     sprintf(currentMoveString, "%c%c%c%c",ff+AAA,rf+ONE,ft+AAA,rt+ONE);
     if (appData.debugMode) {
@@ -810,7 +810,7 @@ extern void CopyBoard P((Board to, Board from));
     if (appData.debugMode) {
         fprintf(debugFP, "Parser FRC short %d %d\n", ff, ft);
     }
-        if(ff < 0 || ft < 0) return 0;
+        if(ff == NoRights || ft == NoRights) return 0;
     }
     sprintf(currentMoveString, "%c%c%c%c",ff+AAA,rf+ONE,ft+AAA,rt+ONE);
     if (appData.debugMode) {