Merge pull request #22 from BTNC/master

fix for windows x64

Author: soumith

paths.c

@@ -602,7 +602,7 @@ lua_dir(lua_State *L)
 
   SB sb;
   struct _finddata_t info;
-  long hfind;
+  intptr_t hfind;
   /* special cases */
   lua_createtable(L, 0, 0);
   if ((s[0]=='/' || s[0]=='\\') && 
@@ -611,7 +611,7 @@ lua_dir(lua_State *L)
       int drive;
       hfind = GetLogicalDrives();
       for (drive='A'; drive<='Z'; drive++)
-        if (hfind & (1<<(drive-'A'))) {
+        if (hfind & ((intptr_t)1<<(drive-'A'))) {
           lua_pushfstring(L, "%c:/", drive);
           lua_rawseti(L, -2, ++k);
         }