1 files changed, 16 insertions, 19 deletions

diff --git a/apps/plugins/puzzles/src/slant.c b/apps/plugins/puzzles/src/slant.c
index 5f9f4f6fed..3fd66115b1 100644
--- a/apps/plugins/puzzles/src/slant.c
+++ b/apps/plugins/puzzles/src/slant.c
@@ -184,24 +184,20 @@ static config_item *game_configure(const game_params *params)
     ret[0].name = "Width";
     ret[0].type = C_STRING;
     sprintf(buf, "%d", params->w);
-    ret[0].sval = dupstr(buf);
-    ret[0].ival = 0;
+    ret[0].u.string.sval = dupstr(buf);
 
     ret[1].name = "Height";
     ret[1].type = C_STRING;
     sprintf(buf, "%d", params->h);
-    ret[1].sval = dupstr(buf);
-    ret[1].ival = 0;
+    ret[1].u.string.sval = dupstr(buf);
 
     ret[2].name = "Difficulty";
     ret[2].type = C_CHOICES;
-    ret[2].sval = DIFFCONFIG;
-    ret[2].ival = params->diff;
+    ret[2].u.choices.choicenames = DIFFCONFIG;
+    ret[2].u.choices.selected = params->diff;
 
     ret[3].name = NULL;
     ret[3].type = C_END;
-    ret[3].sval = NULL;
-    ret[3].ival = 0;
 
     return ret;
 }
@@ -210,14 +206,14 @@ static game_params *custom_params(const config_item *cfg)
 {
     game_params *ret = snew(game_params);
 
-    ret->w = atoi(cfg[0].sval);
-    ret->h = atoi(cfg[1].sval);
-    ret->diff = cfg[2].ival;
+    ret->w = atoi(cfg[0].u.string.sval);
+    ret->h = atoi(cfg[1].u.string.sval);
+    ret->diff = cfg[2].u.choices.selected;
 
     return ret;
 }
 
-static char *validate_params(const game_params *params, int full)
+static const char *validate_params(const game_params *params, int full)
 {
     /*
      * (At least at the time of writing this comment) The grid
@@ -417,7 +413,7 @@ static void fill_square(int w, int h, int x, int y, int v,
 }
 
 static int vbitmap_clear(int w, int h, struct solver_scratch *sc,
-                         int x, int y, int vbits, char *reason, ...)
+                         int x, int y, int vbits, const char *reason, ...)
 {
     int done_something = FALSE;
     int vbit;
@@ -738,7 +734,7 @@ static int slant_solve(int w, int h, const signed char *clues,
                 int fs, bs, v;
                 int c1, c2;
 #ifdef SOLVER_DIAGNOSTICS
-                char *reason = "<internal error>";
+                const char *reason = "<internal error>";
 #endif
 
                 if (soln[y*w+x])
@@ -1216,7 +1212,7 @@ static char *new_game_desc(const game_params *params, random_state *rs,
     return desc;
 }
 
-static char *validate_desc(const game_params *params, const char *desc)
+static const char *validate_desc(const game_params *params, const char *desc)
 {
     int w = params->w, h = params->h, W = w+1, H = h+1;
     int area = W*H;
@@ -1460,7 +1456,7 @@ static int check_completion(game_state *state)
 }
 
 static char *solve_game(const game_state *state, const game_state *currstate,
-                        const char *aux, char **error)
+                        const char *aux, const char **error)
 {
     int w = state->p.w, h = state->p.h;
     signed char *soln;
@@ -1683,7 +1679,7 @@ static char *interpret_move(const game_state *state, game_ui *ui,
     } else if (IS_CURSOR_SELECT(button)) {
         if (!ui->cur_visible) {
             ui->cur_visible = 1;
-            return "";
+            return UI_UPDATE;
         }
         x = ui->cur_x;
         y = ui->cur_y;
@@ -1692,7 +1688,7 @@ static char *interpret_move(const game_state *state, game_ui *ui,
     } else if (IS_CURSOR_MOVE(button)) {
         move_cursor(button, &ui->cur_x, &ui->cur_y, w, h, 0);
         ui->cur_visible = 1;
-        return "";
+        return UI_UPDATE;
     } else if (button == '\\' || button == '\b' || button == '/') {
         int x = ui->cur_x, y = ui->cur_y;
         if (button == ("\\" "\b" "/")[state->soln[y*w + x] + 1]) return NULL;
@@ -2193,7 +2189,8 @@ int main(int argc, char **argv)
 {
     game_params *p;
     game_state *s;
-    char *id = NULL, *desc, *err;
+    char *id = NULL, *desc;
+    const char *err;
     int grade = FALSE;
     int ret, diff, really_verbose = FALSE;
     struct solver_scratch *sc;