virsh: Define multi line macros properly

In some cases there's dangling backward slash at the end of multi
line macros. While technically the code works, it will stop if
some empty lines are removed.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>

tools/virt-host-validate-bhyve.c

@@ -37,7 +37,7 @@
                        _("%s module is not loaded, " err_msg), \
                         #mod); \
         ret = -1; \
-    } \
+    }
 
 #define MODULE_STATUS_FAIL(mod, err_msg) \
     MODULE_STATUS(mod, err_msg, VIR_HOST_VALIDATE_FAIL)