fix: return value error for CompileLua example

[warjiang]

Fixes # .
Just fix a show-case error about CompileLua
The example in Sharing Lua byte code between LStates,
CompileLua function return two values, but when invoke CompileLua only use one return value

Changes proposed in this pull request:

• a
• b
• c
• d

[warjiang]

/assign @yuin