Tiny bugfix in solution writing

1 files changed, 5 insertions, 4 deletions

diff --git a/src/solvers/solutions.h b/src/solvers/solutions.h
index d8e1954..bbff9cf 100644
--- a/src/solvers/solutions.h
+++ b/src/solvers/solutions.h
@@ -152,12 +152,13 @@ appendsolution(
                     list->size - list->used, list->buf + list->used);
                 if (strl < 0)
                         goto appendsolution_error_buffer;
-                list->used += (size_t)(strl-1);
+                list->used += strl;
 
                 /* Write moves on inverse with NISS notation */
                 if (tsol[r].npremoves > 0) {
-                        if (!appendchar(list, ' '))
-                                goto appendsolution_error_buffer;
+                        if (strl > 0)
+                                if (!appendchar(list, ' '))
+                                        goto appendsolution_error_buffer;
                         if (!appendchar(list, '('))
                                 goto appendsolution_error_buffer;
 
@@ -165,7 +166,7 @@ appendsolution(
                             list->size - list->used, list->buf + list->used);
                         if (strl < 0)
                                 goto appendsolution_error_buffer;
-                        list->used += (size_t)(strl-1);
+                        list->used += strl;
 
                         if (!appendchar(list, ')'))
                                 goto appendsolution_error_buffer;