leaseshelper: reduce indentation level in virLeaseReadCustomLeaseFile

Instead of nested ifs, jump out early.

Mostly whitespace changes.

src/network/leaseshelper.c

@@ -132,12 +132,19 @@ virLeaseReadCustomLeaseFile(virJSONValuePtr leases_array_new,
     }
 
     /* Check for previous leases */
-    if (custom_lease_file_len) {
+    if (custom_lease_file_len == 0) {
+        ret = 0;
+        goto cleanup;
+    }
+
     if (!(leases_array = virJSONValueFromString(lease_entries))) {
         virReportError(VIR_ERR_INTERNAL_ERROR,
                        _("invalid json in file: %s, rewriting it"),
                        custom_lease_file);
-        } else {
+        ret = 0;
+        goto cleanup;
+    }
+
     if (!virJSONValueIsArray(leases_array)) {
         virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                        _("couldn't fetch array of leases"));
@@ -146,7 +153,6 @@ virLeaseReadCustomLeaseFile(virJSONValuePtr leases_array_new,
 
     i = 0;
     while (i < virJSONValueArraySize(leases_array)) {
-
         if (!(lease_tmp = virJSONValueArrayGet(leases_array, i))) {
             virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                            _("failed to parse json"));
@@ -199,8 +205,6 @@ virLeaseReadCustomLeaseFile(virJSONValuePtr leases_array_new,
 
         ignore_value(virJSONValueArraySteal(leases_array, i));
     }
-        }
-    }
 
     ret = 0;