fix typeerror when setting volume; fix processing of volume updates in client-side webinterface

interface.py

@@ -406,7 +406,7 @@ def post():
             elif action == "volume_set_value":
                 if 'new_volume' in request.form:
                     # new_volume is slider value ranging from 0-100
-                    var.bot.volume_set = (request.form['new_volume'] * 0.01)
+                    var.bot.volume_set = (int(request.form['new_volume']) * 0.01)
                     if var.bot.volume_set > 1:
                         var.bot.volume_set = 1
                     elif var.bot.volume_set < 0:

templates/index.html

@@ -724,7 +724,7 @@
                 $("#random-btn").removeClass("btn-primary").addClass("btn-secondary").prop("disabled", false);
                 $("#autoplay-btn").removeClass("btn-secondary").addClass("btn-primary").prop("disabled", true);
             }
-            $("#volume-slider").value = volume;
+            document.getElementById("volume-slider").value = Math.round(volume*100);
         }
 
         function themeInit(){