fix equipment static memory leak

src/kernel/config.c

@@ -31,6 +31,7 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #include "building.h"
 #include "calendar.h"
 #include "direction.h"
+#include "equipment.h"
 #include "faction.h"
 #include "group.h"
 #include "item.h"
@@ -1079,6 +1080,7 @@ void free_gamedata(void)
 {
     int i;
     free_donations();
+    free_equipment();
 
     for (i = 0; i != MAXLOCALES; ++i) {
         if (defaults[i]) {

src/kernel/equipment.c

@@ -223,3 +223,15 @@ void equip_items(struct item **items, const struct equipment *eq)
         }
     }
 }
+
+void free_equipment(void) {
+    equipment **eqp = &equipment_sets;
+    while (*eqp) {
+        equipment *eq = *eqp;
+        *eqp = eq->next;
+        free(eq->name);
+        spellbook_clear(eq->spellbook);
+        // TODO: items, subsets
+        free(eq);
+    }
+}

src/kernel/equipment.h

@@ -75,6 +75,7 @@ extern "C" {
         int mask);
     void equip_items(struct item **items, const struct equipment *eq);
 
+    void free_equipment(void);
 #ifdef __cplusplus
 }
 #endif