Utility methods to read colortable

Session/PTYTextView.h

@@ -319,6 +319,7 @@ typedef struct PTYFontInfo PTYFontInfo;
 - (void)setBGColor:(NSColor*)color;
 - (void)setBoldColor:(NSColor*)color;
 - (void)setColorTable:(int) theIndex color:(NSColor *) c;
+- (NSColor *)colorInColorTableWithIndex:(int) theIndex;
 - (void)setSelectionColor:(NSColor *)aColor;
 - (void)setCursorColor:(NSColor*)color;
 - (void)setSelectedTextColor:(NSColor *)aColor;

Session/PTYTextView.m

@@ -497,6 +497,12 @@ static NSImage* wrapToBottomImage = nil;
     [self setNeedsDisplay:YES];
 }
+- (NSColor *)colorInColorTableWithIndex:(int) theIndex
+{
+	if(theIndex > 255) return nil;
+	return colorTable[theIndex];
+}
+
 - (NSColor*)_colorForCode:(int)theIndex alternateSemantics:(BOOL)alt bold:(BOOL)isBold
 {
     NSColor* color;