Fix regression in cupsRasterRead/WriteHeader.

Author: michaelrsweet

cups/raster-stream.c

@@ -1726,7 +1726,8 @@ cups_raster_read(cups_raster_t *r,	// I - Raster stream
 static int				// O - 1 on success, 0 on failure
 cups_raster_update(cups_raster_t *r)	// I - Raster stream
 {
-  int	ret = 1;			// Return value
+  int		ret = 1;		// Return value
+  unsigned	bytesPerLine;		// Expected bytes per line
 
 
   if (r->sync == CUPS_RASTER_SYNCv1 || r->sync == CUPS_RASTER_REVSYNCv1 ||
@@ -1842,6 +1843,10 @@ cups_raster_update(cups_raster_t *r)	// I - Raster stream
     ret = 0;
   }
 
+  bytesPerLine = (r->header.cupsWidth * r->header.cupsBitsPerPixel + 7) / 8;
+  if (r->header.cupsColorOrder == CUPS_ORDER_BANDED)
+    bytesPerLine *= r->header.cupsNumColors;
+
   if (r->header.cupsBytesPerLine == 0)
   {
     _cupsRasterAddError("Invalid raster line length 0.");
@@ -1857,7 +1862,7 @@ cups_raster_update(cups_raster_t *r)	// I - Raster stream
     _cupsRasterAddError("Raster line length %u is not a multiple of the pixel size (%d).", r->header.cupsBytesPerLine, r->bpp);
     ret = 0;
   }
-  else if (r->header.cupsBytesPerLine != ((r->header.cupsWidth * r->header.cupsBitsPerPixel + 7) / 8))
+  else if (r->header.cupsBytesPerLine != bytesPerLine)
   {
     _cupsRasterAddError("Raster line length %u does not match width (%u) and bits per pixel (%u).", r->header.cupsBytesPerLine, r->header.cupsWidth, r->header.cupsBitsPerPixel);
     ret = 0;