Release TRI's (PRI's) graphics state after processing. Give a possibility to preserve it.

Autoported commit.
Original commit hash: [94503540]

Author: ars18wrw

itext/itext.cleanup/itext/pdfcleanup/PdfCleanUpProcessor.cs

@@ -232,6 +232,12 @@ protected internal static Matrix OperandsToMatrix(IList<PdfObject> operands) {
             return new Matrix(a, b, c, d, e, f);
         }
 
+        private override void EventOccurred(IEventData data, EventType type) {
+            if (supportedEvents == null || supportedEvents.Contains(type)) {
+                eventListener.EventOccurred(data, type);
+            }
+        }
+
         private void WriteGsParamsIfFormXObject(String @operator, IList<PdfObject> operands) {
             if ("Do".Equals(@operator)) {
                 PdfStream formStream = GetXObjectStream((PdfName)operands[0]);

port-hash

@@ -1 +1 @@
-7fba41352cdf37ddb1a6bc173f539ccba7bf9795
+9450354018716a490b31c4f81c28207d85d88776