a solution then it should not deduce that no solution exists. Change
wording of the error message returned from the Solve user action.
[originally from svn r9387]
/* That didn't work; try solving from the clean puzzle. */
solved = dup_game(state);
if (dosolve(solved, sflags, NULL) > 0) goto solved;
- *error = "Puzzle is not self-consistent.";
+ *error = "Unable to find a solution to this puzzle.";
goto done;
solved: