xworld, pdbox: Fix issues with using strncpy

Change-Id: Iaed18b7c856b7febef443d1e3e5f6b527b32ecae

apps/plugins/pdbox/pdbox.h

@@ -160,6 +160,9 @@ void pd_init(void);
 #undef strncat
 #define strncat rb_strncat
 
+#undef strncpy
+#define strncpy rb->strncpy
+
 //#ifndef SIMULATOR
 /*FIXME: is it a correct replacement??? */
 /* #if !(CONFIG_PLATFORM & PLATFORM_HOSTED) */

apps/plugins/xworld/engine.c

@@ -306,6 +306,8 @@ void engine_processInput(struct Engine* e) {
     }
 }
 
+#undef strncpy
+
 void engine_makeGameStateName(struct Engine* e, uint8_t slot, char *buf, int sz) {
     (void) e;
     rb->snprintf(buf, sz, "xworld_save.s%02d", slot);