mu3: coin input added

mu3io/config.c

@@ -0,0 +1,22 @@
+#include <windows.h>
+
+#include <assert.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#include "mu3io/config.h"
+
+void mu3_io_config_load(
+        struct mu3_io_config *cfg,
+        const wchar_t *filename)
+{
+    wchar_t key[16];
+    int i;
+
+    assert(cfg != NULL);
+    assert(filename != NULL);
+
+    cfg->vk_test = GetPrivateProfileIntW(L"io4", L"test", '1', filename);
+    cfg->vk_service = GetPrivateProfileIntW(L"io4", L"service", '2', filename);
+    cfg->vk_coin = GetPrivateProfileIntW(L"io4", L"coin", '3', filename);
+}