Fixes a spurious NPE during a web mode rebind failure.

Found by: rdamazio
Review by: spoon (desk)

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@5486 8db76d5a-ed1c-0410-87a9-c151d255dfc7
diff --git a/dev/core/src/com/google/gwt/dev/jdt/WebModeCompilerFrontEnd.java b/dev/core/src/com/google/gwt/dev/jdt/WebModeCompilerFrontEnd.java
index ef33ecb..a6c36cc 100644
--- a/dev/core/src/com/google/gwt/dev/jdt/WebModeCompilerFrontEnd.java
+++ b/dev/core/src/com/google/gwt/dev/jdt/WebModeCompilerFrontEnd.java
@@ -192,6 +192,7 @@
       } catch (UnableToCompleteException e) {
         FindDeferredBindingSitesVisitor.reportRebindProblem(site,
             "Failed to resolve '" + reqType + "' via deferred binding");
+        rebindAnswers.put(reqType, new String[0]);
       }
     }