Ignore extra spaces in path when not running on Windows

(cherry picked from commit 6d0f10b877912edef21232c64339cc6548d9690e)

src/NzbDrone.Common/Extensions/PathExtensions.cs

@@ -147,14 +147,14 @@ namespace NzbDrone.Common.Extensions
                 return false;
             }
 
-            if (path.Trim() != path)
-            {
-                return false;
-            }
-
             // Only check for leading or trailing spaces for path when running on Windows.
             if (OsInfo.IsWindows)
             {
+                if (path.Trim() != path)
+                {
+                    return false;
+                }
+
                 var directoryInfo = new DirectoryInfo(path);
 
                 while (directoryInfo != null)