Fix CssProviderLeaf(filename="...")

[fcard]

There was an extra type in the c function signature.

[vtjnash]

the return type is wrong too -- should be Cint != 0, not Bool (also for gtk_css_provider_load_from_data)

https://developer.gnome.org/gtk3/stable/GtkCssProvider.html#gtk-css-provider-load-from-path

[vtjnash]

also, can I ask you to squash the commits into one commit?

[fcard]

I will, but for some reason the travis log keeps saying the css file is invalid (even through it works for me both on windows and linux), so I am trying to guess what the problem is and fix that first.

[fcard]

Yeah, I don't get it, for some reason travis is reading the css file differently. I am going to try to reproduce the travis environment here to debug this out, I will be back soon.

Meanwhile, CssProviderLeaf(data="...") locks my computer on windows, no clue about that one either.

[fcard]

Done! There was some problem with travis's gtk when parsing the font-size attribute.
@vtjnash, changing the return type caused a method error with !, so I am going to leave it as is for this PR, if you don't mind, to keep things simple.

[hustf]

A checkout (with this included) fixed:

(julia.exe:447752): GModule-CRITICAL **: g_module_symbol: assertion 'symbol != N
ULL' failed

which, I believe, appears when calling win = Gtk.@ Window("stuff", 800,600).

I believe this lead to unexpected behaviours in recent additions GTK utilities, Immerse and ProfileView as a window is actually opening and appears to work fine. This error message from GTK is already scrolled way up the screen when errors occur. So tag, please.

[hustf]

Sorry, I was too quick there. The specific test case worked. I jumped into other modules and that may have changed some state. If I run Pkg.test("Gtk") on version 0.9.3+ I get:

julia> Pkg.test("Gtk")
INFO: Testing Gtk
.juliarc define function: lastfile()

(julia.exe:449068): GModule-CRITICAL **: g_module_symbol: assertion 'symbol != NULL' failed
**     repeated around 30 times    **
WARNING: Method definition g_type(Type{##9#T<:Gtk.GtkWidget}) in module Gtk at C:\Users\F\.julia\v0.4\Gtk\src\GLib\
gtype.jl:181 overwritten in module Test at C:\Users\F\.julia\v0.4\Gtk\src\GLib\gtype.jl:181.
The following messages:
   WARNING: Error in @guarded callback
are expected and a sign of normal operation.
WARNING: Error in @guarded callback
ERROR: UndefVarError: k not defined
WARNING: Error in @guarded callback
ERROR: UndefVarError: k not defined
WARNING: Error in @guarded callback
ERROR: UndefVarError: k not defined
WARNING: Error in @guarded callback
ERROR: UndefVarError: k not defined

(julia.exe:449068): GModule-CRITICAL **: g_module_symbol: assertion 'symbol != NULL' failed
INFO: Gtk tests passed