Minor fixes
-Can specify full 256-bit hex value for --stride instead of 64-bit values
-Added missing error check in OpenCL initialization
-Fixed bug where hex formatted with h suffix (e.g. 1234h) was not parsed properly
-Can specify full 256-bit hex value for --stride instead of 64-bit values
-Added missing error check in OpenCL initialization
-Fixed bug where hex formatted with h suffix (e.g. 1234h) was not parsed properly