Processor crashes on some truncated minidumps after #222. r=ted.mielczarek

http://groups.google.com/group/google-breakpad-dev/browse_thread/thread/a451668b1ece259f


git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@254 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/google_breakpad/processor/minidump.h

@@ -109,6 +109,8 @@ class MinidumpObject {
  public:
   virtual ~MinidumpObject() {}
 
+  bool valid() const { return valid_; }
+
  protected:
   explicit MinidumpObject(Minidump* minidump);