fix #15, and prepare for #9
* fix #15 decompile sub function not output local defines of upvalues all the time
+ add comments to some StringBuffer functions
- remove STRING_LOCALE
+ add char* ProcessSubFunction(Proto* cf, int indent, int func_checking, char* funcnumstr)
close #9 #10
+ recompiling and compare is ok
* fix a bug that use fixed global buffer should like this: char buf[]={"content"}; fix var unknown_local and unknown_upvalue
+ add test case issue15_fn_upvalue.lua for #15