Log Message:
Update onscripter to 20121019.

pkgsrc changes:
 - add PKG_OPTION onscripter-pda that enables PDA_AUTOSIZE option
   to fit window size to screen on small PDA devices like W-ZERO3 and Zaurus

upstream changes since 20120926:

20121029:
 - fix compiler error on iOS target build environment

20121019: serious bug fix
 - fix memory leak per rendering a glyph, slipped in since 20050819

20121016:
 - reimplement yesnobox insn to allow yes/no choice in dialog
 - implement okcancelbox insn
 - enlarge buttons in yesnobox and okcancelbox dialogs
 - allow mapping right click to no/cancle in yesnobox and okcancelbox insns