* DiscImageChef/Main.cs:

* DiscImageChef/Options.cs:
	* DiscImageChef/DiscImageChef.csproj:
	* DiscImageChef/Commands/MediaScan.cs:
	  Added media-scan command.

	* DiscImageChef.Decoders/SCSI/Inquiry.cs:
	  Fixes decoding for devices that follow old 5-byte SCSI
	  INQUIRY format.

	* DiscImageChef.Decoders/SCSI/Sense.cs:
	  Fixes printing of sense block missing a newline.

	* DiscImageChef.Devices/Device/Variables.cs:
	* DiscImageChef.Devices/Device/Constructor.cs:
	  Added an IsRemovable field.

	* DiscImageChef.Devices/Device/ScsiCommands.cs:
	  Fixed SCSI READ CAPACITY CDB size.
	Fixed READ CD-DA MSF method name.
	Implemented SCSI SEEK (6) and SEEK (10) commands.

	* DiscImageChef.Devices/Linux/Command.cs:
	* DiscImageChef.Devices/Windows/Command.cs:
	  Fixed memory leaking on unmanaged heap.

	* DiscImageChef.Helpers/StringHandlers.cs:
	  Fixed string conversion when input byte array is null.

	* DiscImageChef/Commands/MediaInfo.cs:
	  Check for inserted medium only on removable media devices.

ChangeLog

@@ -1,3 +1,8 @@
+2015-12-30  Natalia Portillo  <claunia@claunia.com>
+
+	* StringHandlers.cs:
+	  Fixed string conversion when input byte array is null.
+
 2015-12-04  Natalia Portillo  <claunia@claunia.com>
 
 	* StringHandlers.cs:

StringHandlers.cs

@@ -61,6 +61,9 @@ namespace DiscImageChef
         /// <param name="encoding">Encoding.</param>
         public static string CToString(byte[] CString, Encoding encoding)
         {
+            if (CString == null)
+                return null;
+
             StringBuilder sb = new StringBuilder();
 			
             for (int i = 0; i < CString.Length; i++)
@@ -81,6 +84,9 @@ namespace DiscImageChef
         /// <param name="PascalString">A length-prefixed (aka Pascal string) ASCII byte array</param>
         public static string PascalToString(byte[] PascalString)
         {
+            if (PascalString == null)
+                return null;
+
             StringBuilder sb = new StringBuilder();
 
             byte length = PascalString[0];
@@ -100,6 +106,9 @@ namespace DiscImageChef
         /// <param name="SpacePaddedString">A space (' ', 0x20, ASCII SPACE) padded ASCII byte array</param>
         public static string SpacePaddedToString(byte[] SpacePaddedString)
         {
+            if (SpacePaddedString == null)
+                return null;
+            
             int length = 0;
 
             for (int i = SpacePaddedString.Length; i >= 0; i--)
@@ -114,10 +123,7 @@ namespace DiscImageChef
                 }
             }
 
-            if (length == 0)
-                return "";
-
-            return Encoding.ASCII.GetString(SpacePaddedString, 0, length);
+            return length == 0 ? "" : Encoding.ASCII.GetString(SpacePaddedString, 0, length);
         }
     }
 }