VFS: Add constant in pawn include to define max path

plugins/include/file.inc

@@ -16,6 +16,19 @@
 #endif
 #define _file_included
 
+/**
+ * @note All paths in AMX Mod X natives are relative to the mod folder
+ * unless otherwise noted.
+ *
+ * Most functions in AMX Mod X (at least, ones that deal with direct 
+ * file manipulation) will support an alternate path specification.
+ */
+ 
+/**
+ * Maximum path length.
+ */
+#define PLATFORM_MAX_PATH  256
+
 /**
  * File inode types for use with open_dir() and next_file().
  */