Fixed a couple of error-creating bugs for battery and client-volume

widgets/battery.lua

@@ -31,7 +31,7 @@ return function(args)
                 local icon_name = out:match("icon%-name:%s+'(battery%-[^']+)'")
                 local value = out:match("percentage:%s+(%d+%%)")
                 icon:get_children_by_id("widget_icon")[1].image = 
-                    style[icon_name:gsub("%-","_")] or 
+                    style[(icon_name or ""):gsub("%-","_")] or 
                     style["battery_missing_symbolic"]
                 if args.percentage and value then
                     icon:get_children_by_id("widget_text")[1].markup = value

widgets/client-volume.lua

@@ -22,7 +22,7 @@ local get_app_volume = function(pid)
     for key,process in pairs(get_pactl_data()) do
         -- Match app by pid
         if process:match("application.process.id = \""..tostring(pid).."\"") then
-            return process:match("Volume: .-(%d?%d?%d)%%")
+            return tonumber(process:match("Volume: .-(%d?%d?%d)%%"))
         end
     end
     -- Return nil and an error if not found matching process
@@ -93,7 +93,7 @@ return function(args)
             if value then
                 slider.value = value
                 widget.children[2] = slider
-                widget.children[1].image = get_icon(tonumber(value))
+                widget.children[1].image = get_icon(value)
             else
                 warning_text.markup = err
                 widget.children[2] = warning_text
@@ -102,7 +102,7 @@ return function(args)
         end)
         slider:connect_signal("widget::redraw_needed",function()
             set_app_volume(client.focus.pid,slider.value)
-            widget.children[1].image = get_icon(tonumber(slider.value))
+            widget.children[1].image = get_icon(slider.value)
         end)
     else
         warning_text.markup = "pactl is not available"