xl/libxl: remove a bunch of pointless assignments

Those values are  overwritten before they can be of any use.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

tools/libxl/libxl_dom.c

@@ -1700,7 +1700,7 @@ void libxl__domain_save(libxl__egc *egc, libxl__domain_suspend_state *dss)
 {
     STATE_AO_GC(dss->ao);
     int port;
-    int rc = ERROR_FAIL;
+    int rc;
 
     /* Convenience aliases */
     const uint32_t domid = dss->domid;

tools/libxl/libxl_remus_disk_drbd.c

@@ -47,7 +47,7 @@ static void drbd_async_call(libxl__egc *egc,
                             void func(libxl__remus_device *),
                             libxl__ev_child_callback callback)
 {
-    int pid = -1, rc;
+    int pid, rc;
     libxl__ao_device *aodev = &dev->aodev;
     STATE_AO_GC(dev->rds->ao);
 

tools/libxl/xl_cmdimpl.c

@@ -4055,7 +4055,7 @@ static pid_t create_migration_child(const char *rune, int *send_fd,
                                         int *recv_fd)
 {
     int sendpipe[2], recvpipe[2];
-    pid_t child = -1;
+    pid_t child;
 
     if (!rune || !send_fd || !recv_fd)
         return -1;
@@ -7794,7 +7794,7 @@ int main_getenforce(int argc, char **argv)
 
 int main_setenforce(int argc, char **argv)
 {
-    int ret, mode = -1;
+    int ret, mode;
     const char *p = NULL;
 
     if (optind >= argc) {