coverity#1158340 Uncaught exception

Change-Id: I6d920feeebe45c2f82dd1bfe37370ac005ad9a69

sc/inc/cellsuno.hxx

@@ -388,7 +388,8 @@ public:
                                 OUString >& aRowDescriptions )
                                     throw(::com::sun::star::uno::RuntimeException);
     virtual ::com::sun::star::uno::Sequence< OUString > SAL_CALL getColumnDescriptions()
-                                throw(::com::sun::star::uno::RuntimeException);
+                                throw(::com::sun::star::uno::RuntimeException,
+                                      std::exception);
     virtual void SAL_CALL   setColumnDescriptions( const ::com::sun::star::uno::Sequence<
                                 OUString >& aColumnDescriptions )
                                     throw(::com::sun::star::uno::RuntimeException);

sc/source/ui/unoobj/cellsuno.cxx

@@ -3250,7 +3250,7 @@ void SAL_CALL ScCellRangesBase::setRowDescriptions(
 }
 
 uno::Sequence<OUString> SAL_CALL ScCellRangesBase::getColumnDescriptions()
-                                                throw(uno::RuntimeException)
+    throw(uno::RuntimeException, std::exception)
 {
     SolarMutexGuard aGuard;
     ScMemChart* pMemChart = CreateMemChart_Impl();