Pr 49279, DemuxInputStream.read() should return unsigned values

(mandated by contract of InputStream)



git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@943929 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/DemuxInputStream.java

@@ -30,6 +30,7 @@ import java.io.InputStream;
  */
 public class DemuxInputStream extends InputStream {
 
+    private static final int MASK_8BIT = 0xFF;
     /**
      * The project to from which to get input.
      */
@@ -54,7 +55,7 @@ public class DemuxInputStream extends InputStream {
         if (project.demuxInput(buffer, 0, 1) == -1) {
             return -1;
         }
-        return buffer[0];
+        return buffer[0] & MASK_8BIT;
     }