Bug 172998 Font "vI" cause error under some special situation.
Reproduce step: 1. new a report; 2. insert 3 labels, input "Arial","Bodoni MT","Bodoni MT Black" respectively, set fonts to "Arial","Bodoni MT","Bodoni MT Black"; 3. preview as postscript. Result: Error.
engine/org.eclipse.birt.report.engine.emitter.postscript/src/org/eclipse/birt/report/engine/emitter/postscript/truetypefont/Util.java
{
	private static int toInt( byte b )
	{
		return 0xff & b;
	}
	private static int mergeInt( int ch1, int ch2, int ch3, int ch4 )
	{
		return ( ( ch1 << 24 ) + ( ch2 << 16 ) + ( ch3 << 8 ) + ch4 );
	}
	private static byte[] get4Bytes( int data )
	{
		byte[] result = new byte[4];
		result[0] = (byte) ( data >> 24 );
		result[1] = (byte) ( data >> 16 );
		result[2] = (byte) ( data >> 8 );
		result[3] = (byte) data;
		return result;
	}
	private static byte[] get2Bytes( int data )