qemu: Fix one type in the error prompt string

s/hostdevwork/hostdev/

src/qemu/qemu_command.c

@@ -553,7 +553,7 @@ qemuAssignDeviceHostdevAlias(virDomainDefPtr def, virDomainHostdevDefPtr hostdev
             int thisidx;
             if ((thisidx = qemuDomainDeviceAliasIndex(&def->hostdevs[i]->info, "hostdev")) < 0) {
                 qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                                _("Unable to determine device index for hostdevwork device"));
+                                _("Unable to determine device index for hostdev device"));
                 return -1;
             }
             if (thisidx >= idx)