(Bloomberg) -- Cracks in the retail and property empire of Austrian billionaire Rene Benko are widening two weeks after the firm revealed its cash reserves were drying up. Most Read from BloombergHamas Chief Who Deceived Israel Is Target No. 1 Deep UndergroundBiden, Xi Declare Progress After Concluding Four-Hour Summit‘Fed-Friendly’ Data Lift Bonds as Stocks Struggle: Markets WrapXi Says China Seeks to Be Friends With US, Won’t Fight ‘Hot War’Some holders of Signa Development bonds are probing w