add separator widget

lib/ugui.c3l/src/ugui_font.c3

@@ -113,10 +113,10 @@ fn void? Font.load(&font, String name, ZString path, uint height, float scale)
 	font.atlas.new(font.id, ATLAS_GRAYSCALE, size, size)!;
 
 // FIXME: this crashes with O1 or greater, why??
-//	// preallocate the ASCII range
-//	for (char c = ' '; c < '~'; c++) {
-//		font.get_glyph((Codepoint)c)!;
-//	}
+	// preallocate the ASCII range
+	for (char c = ' '; c < '~'; c++) {
+		font.get_glyph((Codepoint)c)!;
+	}
 }
 
 fn Glyph*? Font.get_glyph(&font, Codepoint code)

lib/ugui.c3l/src/widgets/ugui_separator.c3

@@ -0,0 +1,16 @@
+module ugui;
+
+
+macro Ctx.separator(&ctx, int width, int height, ...)
+	=> ctx.separator_id(@compute_id($vasplat), width, height);
+fn void? Ctx.separator_id(&ctx, Id id, int width, int height)
+{
+	id = ctx.gen_id(id)!;
+	Elem *parent = ctx.get_parent()!;
+	Elem *elem = ctx.get_elem(id, ETYPE_NONE)!;
+
+	elem.layout.w = @exact((short)width);
+	elem.layout.h = @exact((short)height);
+
+	update_parent_size(elem, parent);
+}