[Patch] Fix GCC 5 narrowing conversion warning.

[mt]

GCC 5 (5.1.0-RC-20150412) reports.

C++ /home/haiku/haiku/haiku/generated-gcc5/objects/haiku/x86/release/add-ons/kernel/bus_managers/firewire/fwohci_pci.o 
/home/haiku/haiku/haiku/src/add-ons/kernel/bus_managers/firewire/fwohci.cpp:90:58: error: narrowing conversion of '-2147483648' from 'int' to 'uint32_t {aka unsigned int}' inside { }
 uint32_t tagbit[4] = { 1 << 28, 1 << 29, 1 << 30, 1 << 31};
                                                          ^

[pulkomandy]

Isn't it better to use "1u << 31" ?

[korli]

Yes it is.

[pulkomandy]

Fixed in hrev49747.