Debugger: Make disassembler caching smarter.

Check if address is contained in range of lines.

Task-number: QTCREATORBUG-5205
Change-Id: I12a4f2f2f3837e164fd093e80fb427e9234136af
Reviewed-on: http://codereview.qt.nokia.com/1017
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

src/plugins/debugger/disassemblerlines.h

@@ -83,6 +83,9 @@ public:
     const DisassemblerLine &at(int i) const { return m_data.at(i); }
     int lineForAddress(quint64 address) const;
 
+    quint64 startAddress() const;
+    quint64 endAddress() const;
+
 private:
     QString m_lastFunction;
     QVector<DisassemblerLine> m_data;