tdf#118022: fix crash when searching record in form by handling SQLException

See https://bugs.documentfoundation.org/attachment.cgi?id=142760
Found thanks on gdb with command
catch throw com::sun::star::sdbc::SQLException

First SQLException was dealt but not the second one

Change-Id: I7d5d3ad612db132a3bda97cff14367912ae885f9
Reviewed-on: https://gerrit.libreoffice.org/55836
Tested-by: Jenkins
Reviewed-by: Lionel Elie Mamane <lionel@mamane.lu>

svx/source/fmcomp/gridcell.cxx

@@ -1150,10 +1150,22 @@ void DbTextField::PaintFieldToCell( OutputDevice& _rDev, const tools::Rectangle&
 
 OUString DbTextField::GetFormatText(const Reference< XColumn >& _rxField, const Reference< XNumberFormatter >& xFormatter, Color** /*ppColor*/)
 {
+    if (!_rxField.is())
+        return OUString();
+
     const css::uno::Reference<css::beans::XPropertySet> xPS(_rxField, UNO_QUERY);
     FormattedColumnValue fmter( xFormatter, xPS );
 
-    return fmter.getFormattedValue();
+    try
+    {
+        return fmter.getFormattedValue();
+    }
+    catch( const Exception& )
+    {
+        DBG_UNHANDLED_EXCEPTION("svx");
+    }
+    return OUString();
+
 }