Fixed the majority of the xz and lzma handling code

There may still be an issue with the compress as menu and tar.lzma support, however it is relatively minor


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdelibs@1166484 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

kio/kio/ktar.cpp

@@ -101,7 +101,7 @@ KTar::KTar( const TQString& filename, const TQString & _mimetype )
                     if ( fourthByte == 4 )
                         mimetype = "application/x-zip";
                 }
-		else if ( firstByte == '\xFD' && secondByte == '7' && thirdByte == 'z' )
+		else if ( firstByte == 0xfd && secondByte == '7' && thirdByte == 'z' )
 		{
 			unsigned char fourthByte = file.getch();
 			unsigned char fifthByte = file.getch();
@@ -109,6 +109,12 @@ KTar::KTar( const TQString& filename, const TQString & _mimetype )
 			if ( fourthByte == 'X' && fifthByte == 'Z' && sixthByte == 0x00 )
 				mimetype = "application/x-xz";
 		}
+		else if ( firstByte == 0x5d && secondByte == 0x00 && thirdByte == 0x00 )
+		{
+			unsigned char fourthByte = file.getch();
+			if ( fourthByte == 0x80 )
+				mimetype = "application/x-lzma";
+		}
             }
             file.close();
         }

mimetypes/application/x-txz.desktop

@@ -1,7 +1,7 @@
 [Desktop Entry]
 Type=MimeType
 MimeType=application/x-txz
-Icon=txz
+Icon=tgz
 Patterns=*.tar.xz;*.txz;
 Comment=Xzipped Tar Archive
 Comment[af]=Xzip gekompakteerde Tar Argief