fix bug in ssyrk, now use only uint for mad24
fix bug in ssyrk, now use only uint for mad24

The problem is only visible if we tune syrk for single precision.

lunochod/clBLAS,guacamoleo/clBLAS,ghisvail/clBLAS,BenjaminCoquelle/clBLAS,linan7788626/clBLAS,kknox/clBLAS,hemmingway/clBLAS,guacamoleo/clBLAS,TimmyLiu/clBLAS,guacamoleo/clBLAS,clMathLibraries/clBLAS,kknox/clBLAS,tingxingdong/clean,hughperkins/clBLAS,hemmingway/clBLAS,lunochod/clBLAS,lunochod/clBLAS,TimmyLiu/clBLAS,tingxingdong/clean,guacamoleo/clBLAS,tmagomedov/clBLAS,kknox/clBLAS,hemmingway/clBLAS,hughperkins/clBLAS,ghisvail/clBLAS,BenjaminCoquelle/clBLAS,clMathLibraries/clBLAS,TimmyLiu/clBLAS,tmagomedov/clBLAS,devfreesg/clBLAS,clMathLibraries/clBLAS,devfreesg/clBLAS,arrayfire/clBLAS,devfreesg/clBLAS,arrayfire/clBLAS,BenjaminCoquelle/clBLAS,hemmingway/clBLAS,lunochod/clBLAS,devfreesg/clBLAS,tingxingdong/clean,hughperkins/clBLAS,linan7788626/clBLAS,ghisvail/clBLAS,tingxingdong/clean,kknox/clBLAS,tmagomedov/clBLAS,linan7788626/clBLAS,ghisvail/clBLAS,BenjaminCoquelle/clBLAS,hughperkins/clBLAS,arrayfire/clBLAS,linan7788626/clBLAS,TimmyLiu/clBLAS,clMathLibraries/clBLAS,tmagomedov/clBLAS,arrayfire/clBLAS