hg: jdk7/tl/langtools: 6980017: javap -XDdetail:source behaves badly if source not available.

[jonathan.gibbons at oracle.com]

Changeset: ae3acbf63943
Author:    jjg
Date:      2010-08-26 16:13 -0700
URL:       http://hg.openjdk.java.net/jdk7/tl/langtools/rev/ae3acbf63943

6980017: javap -XDdetail:source behaves badly if source not available.
Reviewed-by: ksrini

! src/share/classes/com/sun/tools/javap/CodeWriter.java
! src/share/classes/com/sun/tools/javap/SourceWriter.java
+ test/tools/javap/T6980017.java