update to latest mruby

[masahino]

update to latest mruby

mruby/mruby@2f8dbd8

fix #29

[ppibburr]

i find memory issues with extensive use

[ppibburr]

the issues ui is unresponsive for me, sorry bout the repeated posts.

[ppibburr]

CFunc::libcall(CFunc::Void,lib="/usr/lib/i386-linux-gnu/libgobject-2.0.so",:g_type_init)
ptr=CFunc::libcall(CFunc::Pointer,lib="/usr/lib/libgirepository-1.0.so",:g_irepository_get_default)
tl = CFunc::libcall(CFunc::Pointer,lib, :g_irepository_require, ptr, "Gtk", nil);

#
# This does not work
#

# Warns about assertion and returns NULL 
p CFunc::libcall(CFunc::Pointer, lib, :g_irepository_find_by_name, ptr, "Gtk", "Window");

#
# This works
#

ary = CFunc::SInt8[4]
ary[0].value="G".bytes[0]
ary[1].value="t".bytes[0]
ary[2].value="k".bytes[0]
ary[3].value=0

ary2 = CFunc::SInt8[7]
i = -1
"Window".bytes.each do |b|
 ary2[i+=1].value = b
end
ary2[6].value = 0

p CFunc::libcall(CFunc::Pointer, lib, :g_irepository_find_by_name, ptr, ary, ary2);