coverity#1374315 Uncaught exception

Change-Id: Id7a01c652d1d11675b87ee732ff40ddd76de6236

forms/source/component/ListBox.cxx

@@ -390,7 +390,7 @@ namespace frm
 
     sal_Bool OListBoxModel::convertFastPropertyValue(
         Any& _rConvertedValue, Any& _rOldValue, sal_Int32 _nHandle, const Any& _rValue)
-        throw (IllegalArgumentException, std::exception)
+        throw (IllegalArgumentException, RuntimeException, std::exception)
     {
         bool bModified(false);
         switch (_nHandle)

forms/source/component/ListBox.hxx

@@ -146,7 +146,7 @@ public:
                 throw (css::uno::Exception, std::exception) 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, std::exception) override;
+                throw (css::lang::IllegalArgumentException, css::uno::RuntimeException, std::exception) override;
 
 protected:
     static const ::connectivity::ORowSetValue s_aEmptyValue;