isl_tab.c: fix up to_col

diff --git a/isl_tab.c b/isl_tab.c
index 3adb11d..dc74e29 100644 (file)
--- a/isl_tab.c
+++ b/isl_tab.c
@@ -1262,21 +1262,21 @@ error:
 /* Pivot a non-negative variable down until it reaches the value zero
  * and then pivot the variable into a column position.
  */
-int to_col(struct isl_tab *tab, struct isl_tab_var *var)
+static int to_col(struct isl_tab *tab, struct isl_tab_var *var)
 {
        int i;
        int row, col;
        unsigned off = 2 + tab->M;
 
        if (!var->is_row)
-               return;
+               return 0;
 
        while (isl_int_is_pos(tab->mat->row[var->index][1])) {
                find_pivot(tab, var, NULL, -1, &row, &col);
                isl_assert(tab->mat->ctx, row != -1, return -1);
                isl_tab_pivot(tab, row, col);
                if (!var->is_row)
-                       return;
+                       return 0;
        }
 
        for (i = tab->n_dead; i < tab->n_col; ++i)