nwfilter: Convert wantRemoved to bool

It is what it is anyway, so let's describe it that way too.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

src/conf/virnwfilterobj.c

@@ -185,12 +185,12 @@ virNWFilterObjTestUnassignDef(virNWFilterObjPtr obj)
 {
     int rc = 0;
 
-    obj->wantRemoved = 1;
+    obj->wantRemoved = true;
     /* trigger the update on VMs referencing the filter */
     if (virNWFilterTriggerVMFilterRebuild())
         rc = -1;
 
-    obj->wantRemoved = 0;
+    obj->wantRemoved = false;
 
     return rc;
 }

src/conf/virnwfilterobj.h

@@ -29,7 +29,7 @@ typedef virNWFilterObj *virNWFilterObjPtr;
 struct _virNWFilterObj {
     virMutex lock;
 
-    int wantRemoved;
+    bool wantRemoved;
 
     virNWFilterDefPtr def;
     virNWFilterDefPtr newDef;