Patched version for OSX and ruby 1.9 author: kelwya@gmail.com
This patch handled building errors below:
ncurses_wrap.c:818: error: dereferencing pointer to incomplete type
ncurses_wrap.c:835: error: dereferencing pointer to incomplete type
ncurses_wrap.c:854: error: dereferencing pointer to incomplete type
or:
undefined symbol: STR2CSTR