Warnings are treated as errors

System: Ubuntu 14.04, 32bit
Kernel: 3.13.0-55-generic
Qemu: v. 2.2.50

Error msg:

hw/acpi/pcihp.c: In function ‘acpi_pcihp_pc_no_hotplug’:
hw/acpi/pcihp.c:117:34: error: ‘PCIDevice’ has no member named ‘qdev’
     return (pc->is_bridge && !dev->qdev.hotplugged) || !dc->hotpluggable;
                                  ^
hw/acpi/pcihp.c:118:1: error: control reaches end of non-void function [-Werror=return-type]
 }
 ^
cc1: all warnings being treated as errors