Fix luacheck warnings in themes/xresources/assets.lua

These were introduced by commit 12e1bd6747.

Signed-off-by: Uli Schlachter <psychon@znc.in>

tests/examples/wibox/logo/logo_and_name.lua

@@ -13,7 +13,7 @@ wibox.widget {
     draw   = function(_, _, cr)
         assets.gen_logo(cr, 128, 128, nil, "#535d6c")
         cr:translate(128 + 128/16, 0)
-        assets.gen_awesome_name(cr, 0, 158, nil, "#535d6c", alt_fg, true)
+        assets.gen_awesome_name(cr, 158, nil, "#535d6c", alt_fg)
     end,
     widget = wibox.widget.base.make_widget
 }

themes/xresources/assets.lua

@@ -61,7 +61,7 @@ local function make_letter(cr, n, lines, size, bg, fg, alt_fg)
     end
 
     lines = lines or {}
-    color = alt_fg or fg
+    local color = alt_fg or fg
     cr:set_source(gears.color(color))
     cr:rectangle(
         0, (size+letter_gap)*n,
@@ -83,7 +83,7 @@ local function make_letter(cr, n, lines, size, bg, fg, alt_fg)
     cr:set_operator(cairo.Operator.OVER)
 end
 
-function theme_assets.gen_awesome_name(cr, width, height, bg, fg, alt_fg, vertical)
+function theme_assets.gen_awesome_name(cr, height, bg, fg, alt_fg)
     local ls = height/10 -- letter_size
     local letter_line = ls/18
 
@@ -178,7 +178,7 @@ function theme_assets.wallpaper(bg, fg, alt_fg, s)
     cr:set_source(gears.color(bg))
     cr:paint()
 
-    theme_assets.gen_awesome_name(cr, width, height, bg, fg, alt_fg, true)
+    theme_assets.gen_awesome_name(cr, height, bg, fg, alt_fg)
 
     return img
 end