Fix verifyOutputBuffer return value in printf (#99)
Fix verifyOutputBuffer return value in printf (#99)

Function verifyOutputBuffer returns non-zero value in case of mismatch.
Return value 'false' means some mismatches are treated as matches. This
commit fix this problem.
KhronosGroup/OpenCL-CTS,KhronosGroup/OpenCL-CTS,KhronosGroup/OpenCL-CTS,KhronosGroup/OpenCL-CTS