Fix odd widths

Didn't realise the GTK+ drawing functions took floats

src/rugby-possibility-widget.c

@@ -80,10 +80,10 @@ rugby_possibility_widget_get_preferred_height (GtkWidget *widget,
 static void
 render_bar (cairo_t         *cr,
             GtkStyleContext *context,
-            gint             x,
-            gint             y,
-            gint             w,
-            gint             h,
+            gdouble          x,
+            gdouble          y,
+            gdouble          w,
+            gdouble          h,
             const gchar     *style)
 {
     gtk_style_context_save (context);
@@ -98,9 +98,9 @@ rugby_possibility_widget_draw (GtkWidget *widget,
 {
     RugbyPossibilityWidget *self = RUGBY_POSSIBILITY_WIDGET (widget);
 
-    gint width = gtk_widget_get_allocated_width (widget);
-    gint height = gtk_widget_get_allocated_height (widget);
-    gint x = 0, y = 0;
+    gdouble width = gtk_widget_get_allocated_width (widget);
+    gdouble height = gtk_widget_get_allocated_height (widget);
+    gdouble x = 0.0, y = 0.0;
 
     GtkStyleContext *context = gtk_widget_get_style_context (widget);
     gtk_style_context_save (context);
@@ -121,7 +121,7 @@ rugby_possibility_widget_draw (GtkWidget *widget,
     gtk_style_context_add_class (context, "fill-block");
 
     // Tries
-    gint w = width / (score / 7.0);
+    gdouble w = width / (score / 7.0);
     for (int i = 0; i < tries; i++)
     {
         render_bar (cr, context, x, y, w, height, "score-try");