stop memory leak from function registry.

src/eressea.c

@@ -13,6 +13,7 @@
 #endif
 #include <triggers/triggers.h>
 #include <util/language.h>
+#include <util/functions.h>
 #include <kernel/xmlreader.h>
 #include <kernel/item.h>
 #include <kernel/building.h>
@@ -46,6 +47,7 @@ void game_done(void)
 #endif
     calendar_cleanup();
 #endif
+    free_functions();
     kernel_done();
 }
 

src/util/functions.c

@@ -48,3 +48,7 @@ void register_function(pf_generic fun, const char *name)
     len = cb_new_kv(name, len, &fun, sizeof(fun), buffer);
     cb_insert(&cb_functions, buffer, len);
 }
+
+void free_functions(void) {
+    cb_clear(&cb_functions);
+}

src/util/functions.h

@@ -26,6 +26,7 @@ extern "C" {
 
     pf_generic get_function(const char *name);
     void register_function(pf_generic fun, const char *name);
+    void free_functions(void);
 
 #ifdef __cplusplus
 }