Provide a mechanism for SymbolSuppliers to interrupt processing (#93)

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@80 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/processor/call_stack.cc

@@ -39,6 +39,10 @@
 namespace google_airbag {
 
 CallStack::~CallStack() {
+  Clear();
+}
+
+void CallStack::Clear() {
   for (vector<StackFrame *>::const_iterator iterator = frames_.begin();
        iterator != frames_.end();
        ++iterator) {