Fixed: Exception when parsing Quality in release title with colon

Signed-off-by: Robin Dadswell <robin@dadswell.email>

src/NzbDrone.Common/Extensions/PathExtensions.cs

@@ -72,6 +72,17 @@ namespace NzbDrone.Common.Extensions
             return string.Equals(firstPath.CleanFilePath(), secondPath.CleanFilePath(), comparison.Value);
         }
 
+        public static string GetPathExtension(this string path)
+        {
+            var idx = path.LastIndexOf('.');
+            if (idx == -1 || idx == path.Length - 1)
+            {
+                return string.Empty;
+            }
+
+            return path.Substring(idx);
+        }
+
         public static string GetRelativePath(this string parentPath, string childPath)
         {
             if (!parentPath.IsParentPath(childPath))

src/NzbDrone.Core/Parser/QualityParser.cs

@@ -2,6 +2,7 @@ using System;
 using System.IO;
 using System.Text.RegularExpressions;
 using NLog;
+using NzbDrone.Common.Disk;
 using NzbDrone.Common.Extensions;
 using NzbDrone.Common.Instrumentation;
 using NzbDrone.Core.MediaFiles;
@@ -94,7 +95,7 @@ namespace NzbDrone.Core.Parser
             {
                 try
                 {
-                    result.Quality = MediaFileExtensions.GetQualityForExtension(Path.GetExtension(name));
+                    result.Quality = MediaFileExtensions.GetQualityForExtension(name.GetPathExtension());
                     result.QualityDetectionSource = QualityDetectionSource.Extension;
                 }
                 catch (ArgumentException)