Add missing methods to SQL database and driver classes
This resolves Bug 2121

diff --git a/sip/qtsql/qsqldatabase.sip b/sip/qtsql/qsqldatabase.sip
index e7d3bf4..c3a11be 100644
--- a/sip/qtsql/qsqldatabase.sip
+++ b/sip/qtsql/qsqldatabase.sip
@@ -80,6 +80,7 @@
 	bool open() /ReleaseGIL/;
 	bool open(const TQString &,const TQString &) /ReleaseGIL/;
 	void close();
+	bool ping();
 	bool isOpen() const;
 	bool isOpenError() const;
 	TQStringList tables() const;
diff --git a/sip/qtsql/qsqldriver.sip b/sip/qtsql/qsqldriver.sip
index 841d5a9..cfde417 100644
--- a/sip/qtsql/qsqldriver.sip
+++ b/sip/qtsql/qsqldriver.sip
@@ -74,6 +74,7 @@
 			  const TQString & = TQString::null,
 			  int = -1) = 0 /ReleaseGIL/;
 	virtual void close() = 0;
+	virtual bool ping() = 0;
 	virtual TQSqlQuery createQuery() const = 0;
 
 %If (TQt_3_2_0 -)