Make debugging more skin friendly

Debug StartMenuDLL used to not find skins when put to Open-Shell
installation folder.

Now it will try to look for skins in default location (Skins folder in
the same folder as DLL) and use alternative (Skins folder one level up)
if not present.

Author: ge0rdi

Src/StartMenu/StartMenuDLL/SkinManager.cpp

@@ -3235,10 +3235,14 @@ void GetSkinsPath( wchar_t *path )
 {
 	GetModuleFileName(g_Instance,path,_MAX_PATH);
 	*PathFindFileName(path)=0;
-#ifdef BUILD_SETUP
 	Strcat(path,_MAX_PATH,L"Skins\\");
-#else
-	Strcat(path,_MAX_PATH,L"..\\Skins\\");
+
+#ifndef BUILD_SETUP
+	if (!PathIsDirectory(path))
+	{
+		*PathFindFileName(path) = 0;
+		Strcat(path,_MAX_PATH,L"..\\Skins\\");
+	}
 #endif
 }