coverity#1374273 Uncaught exception

Change-Id: Ia2738aeb9d1092dd0738801022c5a729b9081f26

forms/source/component/Grid.cxx

@@ -488,8 +488,10 @@ void OGridControlModel::getFastPropertyValue(Any& rValue, sal_Int32 nHandle ) co
                 OControlModel::getFastPropertyValue( rValue, nHandle );
     }
 }
+
 sal_Bool OGridControlModel::convertFastPropertyValue( Any& rConvertedValue, Any& rOldValue,
-                                                    sal_Int32 nHandle, const Any& rValue )throw( IllegalArgumentException )
+                                                    sal_Int32 nHandle, const Any& rValue )
+    throw(IllegalArgumentException, RuntimeException, std::exception)
 {
     bool bModified(false);
     switch (nHandle)

forms/source/component/Grid.hxx

@@ -147,7 +147,7 @@ public:
     virtual void SAL_CALL getFastPropertyValue(css::uno::Any& rValue, sal_Int32 nHandle ) const override;
     virtual sal_Bool SAL_CALL convertFastPropertyValue(css::uno::Any& rConvertedValue, css::uno::Any& rOldValue,
                                           sal_Int32 nHandle, const css::uno::Any& rValue )
-                                        throw(css::lang::IllegalArgumentException) override;
+                                        throw(css::lang::IllegalArgumentException, css::uno::RuntimeException, std::exception) override;
     virtual void SAL_CALL setFastPropertyValue_NoBroadcast(sal_Int32 nHandle, const css::uno::Any& rValue) throw ( css::uno::Exception, std::exception) override;
 
     // XPropertyState