Fixed SEGV when trying to move an empty column.

2 files changed, 5 insertions, 3 deletions

diff --git a/Makefile b/Makefile
index 9f2b522..1002baa 100644
--- a/Makefile
+++ b/Makefile
@@ -25,7 +25,7 @@
 LIBS=-lcurses
 
 csol: csol.c
-	$(CC) -o csol csol.c $(LIBS)
+	$(CC) -g -o csol csol.c $(LIBS)
 
 clean:
 	-rm -f csol csol.exe core
diff --git a/csol.c b/csol.c
index d305c13..f07e755 100644
--- a/csol.c
+++ b/csol.c
@@ -696,14 +696,16 @@ static void Klondike(int draw)
                 {
                     int can_move = FALSE;
 
-                    if (column_up[move_pos_x].card[move_pos_y].value == 13 &&
+                    if (column_up[move_pos_x].no && 
+                        column_up[move_pos_x].card[move_pos_y].value == 13 &&
                         column_up[pos_x].no == 0 && column_down[pos_x].no == 0)
                     {
                         can_move = TRUE;
                     }
                     else
                     {
-                        if (CanCardSitOnTop
+                        if (column_up[move_pos_x].no &&
+                            CanCardSitOnTop
                                 (column_up[move_pos_x].card[move_pos_y],
                                  TopOfPile(&column_up[pos_x])))
                         {