REGRESSION: reachability bug exposed by j2se build

The following bug in reachability analysis was exposed by the j2se build.

==========> cat -n T.java
     1 class T {
     2 int f(int a) {
     3 for (int ix = 0; ; ix++) {
     4 if (ix == a)
     5 break;
     6 try {
     7 return 10;
     8 } catch (Error ex) {
     9 }
    10 }
    11 return a;
    12 }
    13 }
==========> newjavac T.java
/usr/java1.4/bin/javac -J-Xbootclasspath/p:/net/frog/gafter/gjc-work/generics/build/bootstrap2 -J-Xfuture -J-ea:com.sun.tools... -J-Xint -bootclasspath /net/frog/gafter/gjc-work/generics/build/collections2:/usr/java1.4/jre/lib/stubs.jar:/usr/java1.4/jre/lib/rt.jar -classpath . T.java
T.java:11: unreachable statement
return a;
        ^
1 error
==========>


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