Fix return type and add DllExport
Fix argument type of data of function MDD_softingCANReadRcvData. According to the Modelica Language Specification input arguments of type String map to const char* C type. If doing so the memcpy operation is no longer allowed. New memory for the return buffer needs to be allocated by ModelicaAllocateString function.
Merge branch 'patch-1' of https://github.com/tbeu/Modelica_DeviceDrivers into tbeu-patch-1
Reverted file to parent version of patch #23
Sine I'm not sure whether modified version will still work in Dymola.
Need to check if hardware is available.