make fluid_settings_foreach_t const correct

include/fluidsynth/settings.h

@@ -193,7 +193,7 @@ FLUIDSYNTH_API char *fluid_settings_option_concat (fluid_settings_t* settings,
  * @param name Setting name
  * @param type Setting type (#fluid_types_enum)
  */
-typedef void (*fluid_settings_foreach_t)(void *data, char *name, int type);
+typedef void (*fluid_settings_foreach_t)(void *data, const char *name, int type);
 
 FLUIDSYNTH_API
 void fluid_settings_foreach(fluid_settings_t* settings, void* data,

src/bindings/fluid_cmd.c

@@ -1444,7 +1444,7 @@ struct _fluid_handle_settings_data_t {
   fluid_ostream_t out;
 };
 
-static void fluid_handle_settings_iter1(void* data, char* name, int type)
+static void fluid_handle_settings_iter1(void* data, const char* name, int type)
 {
   struct _fluid_handle_settings_data_t* d = (struct _fluid_handle_settings_data_t*) data;
 
@@ -1454,7 +1454,7 @@ static void fluid_handle_settings_iter1(void* data, char* name, int type)
   }
 }
 
-static void fluid_handle_settings_iter2(void* data, char* name, int type)
+static void fluid_handle_settings_iter2(void* data, const char* name, int type)
 {
   struct _fluid_handle_settings_data_t* d = (struct _fluid_handle_settings_data_t*) data;
 

src/fluidsynth.c

@@ -154,7 +154,7 @@ settings_option_foreach_func (void *data, const char *name, const char *option)
 
 /* fluid_settings_foreach function for displaying option help  "-o help" */
 static void
-settings_foreach_func (void *data, char *name, int type)
+settings_foreach_func (void *data, const char *name, int type)
 {
   fluid_settings_t *settings = (fluid_settings_t *)data;
   double dmin, dmax, ddef;

src/utils/fluid_settings.c

@@ -1613,7 +1613,7 @@ fluid_settings_foreach (fluid_settings_t* settings, void* data,
   {
     if (fluid_settings_get (settings, (const char *)(p->data), &node) == FLUID_OK
         && node)
-        (*func) (data, (char *)(p->data), node->type);
+        (*func) (data, (const char *)(p->data), node->type);
     FLUID_FREE (p->data);       /* -- Free name */
   }