Remove stream.parameters which wasn't being set consistently. Fixes issue #2881.

src/obj.js

@@ -550,7 +550,7 @@ var XRef = (function XRefClosure() {
       if (!('streamState' in this)) {
         // Stores state of the stream as we process it so we can resume
         // from middle of stream in case of missing data error
-        var streamParameters = stream.parameters;
+        var streamParameters = stream.dict;
         var byteWidths = streamParameters.get('W');
         var range = streamParameters.get('Index');
         if (!range) {
@@ -567,7 +567,7 @@ var XRef = (function XRefClosure() {
       this.readXRefStream(stream);
       delete this.streamState;
 
-      return stream.parameters;
+      return stream.dict;
     },
 
     readXRefStream: function XRef_readXRefStream(stream) {
@@ -903,8 +903,8 @@ var XRef = (function XRefClosure() {
       stream = this.fetch(new Ref(tableOffset, 0));
       if (!isStream(stream))
         error('bad ObjStm stream');
-      var first = stream.parameters.get('First');
+      var first = stream.dict.get('First');
-      var n = stream.parameters.get('N');
+      var n = stream.dict.get('N');
       if (!isInt(first) || !isInt(n)) {
         error('invalid first and n parameters for ObjStm stream');
       }

src/parser.js

@@ -180,7 +180,7 @@ var Parser = (function ParserClosure() {
       if (cipherTransform)
         imageStream = cipherTransform.createStream(imageStream);
       imageStream = this.filter(imageStream, dict, length);
-      imageStream.parameters = dict;
+      imageStream.dict = dict;
 
       this.buf2 = Cmd.get('EI');
       this.shift();
@@ -216,7 +216,7 @@ var Parser = (function ParserClosure() {
       if (cipherTransform)
         stream = cipherTransform.createStream(stream);
       stream = this.filter(stream, dict, length);
-      stream.parameters = dict;
+      stream.dict = dict;
       return stream;
     },
     filter: function Parser_filter(stream, dict, length) {

src/stream.js

@@ -26,7 +26,7 @@ var Stream = (function StreamClosure() {
     this.start = start || 0;
     this.pos = this.start;
     this.end = (start + length) || this.bytes.length;
-    this.parameters = this.dict = dict;
+    this.dict = dict;
   }
 
   // required methods for a stream. if a particular stream does not