sync/bulk clearparam bug fixed

c/build/win32/.vs/dxl_x86_c/v14/.suo

c/build/win32/output/dxl_x86_c.dll

c/build/win32/output/dxl_x86_c.lib

c/example/protocol1.0/bulk_read/win32/.vs/bulk_read/v14/.suo

...mple/protocol1.0/sync_write/win32/.vs/sync_write/v14/.suo

...col2.0/bulk_read_write/win32/.vs/bulk_read_write/v14/.suo

...col2.0/sync_read_write/win32/.vs/sync_read_write/v14/.suo

c/src/dynamixel_sdk/group_bulk_read.c

c/src/dynamixel_sdk/group_bulk_write.c

c/src/dynamixel_sdk/group_sync_read.c

c/src/dynamixel_sdk/group_sync_write.c