fix bugs in aspk/window-position-to-buffer-point.
fix bugs in aspk/window-position-to-buffer-point.

1. begin will be point-max + 1;
2. dcolumn will be -1.

astropeak/aspk-code-base,astropeak/aspk-code-base,astropeak/aspk-code-base,astropeak/aspk-code-base,astropeak/aspk-code-base,astropeak/aspk-code-base,astropeak/aspk-code-base,astropeak/aspk-code-base,astropeak/aspk-code-base