Fix invalid memory access on Nvidia GPUs in CSR-Adaptive SpMV kernel (#192)
Fix invalid memory access on Nvidia GPUs in CSR-Adaptive SpMV kernel (#192)

* corrected condition to prevent buffer overflow (fixes bug on Nvidia K20m)

* removed unneeded line

jlgreathouse/clSPARSE,clMathLibraries/clSPARSE,jlgreathouse/clSPARSE,kknox/clSPARSE,clMathLibraries/clSPARSE,kknox/clSPARSE,ghisvail/clSPARSE,ghisvail/clSPARSE