fix @:enum abstract field access (see #2939)

std/python/_std/StringBuf.hx

@@ -56,9 +56,9 @@ class StringBuf {
 
 	public function get_length ():Int {
 		var pos = b.tell();
-		b.seek(0, SeekSet.SeekEnd);
+		b.seek(0, SeekEnd);
 		var len = b.tell();
-		b.seek(pos, SeekSet.SeekSet);
+		b.seek(pos, SeekSet);
 		return len;
 	}
 

std/python/io/IoTools.hx

@@ -35,14 +35,14 @@ class IoTools {
 	{
  		var pos = switch (pos) {
  			case SeekBegin:
- 				SeekSet.SeekSet;
+ 				SeekSet;
  			case SeekCur:
  				p = tell() + p;
- 				SeekSet.SeekSet;
+ 				SeekSet;
  			case SeekEnd :
- 				stream.seek(0, SeekSet.SeekEnd);
+ 				stream.seek(0, SeekEnd);
  				p = tell() + p;
- 				SeekSet.SeekSet;
+ 				SeekSet;
  		}
  		stream.seek(p, pos);
 	}
@@ -51,9 +51,9 @@ class IoTools {
 	{
  		var pos = switch(pos)
 		{
-			case SeekBegin: SeekSet.SeekSet;
-			case SeekCur: SeekSet.SeekCur;
-			case SeekEnd: SeekSet.SeekEnd;
+			case SeekBegin: SeekSet;
+			case SeekCur: SeekCur;
+			case SeekEnd: SeekEnd;
 		};
 		stream.seek(p, pos);
 	}