LONDON, Oct 13 - European shares turned positive on Tuesday morning, with gains for telecoms offsetting falls in banks. At 0731 GMT, the FTSEurofirst 300 index of top European shares was up 0.1 percent at 1,005.83 points, and had gone as high as 1,006.16. Banks were the biggest drag on the index. Banco Santander , Barclays , Credit Suisse , Deutsche Bank , and Societe Generale fell between 0.4 a  Full Article