Drop redundant NULL checks, and add an error string prefix

Signed-off-by: Cole Robinson <crobinso@redhat.com>
---
 src/qemu/qemu_monitor_text.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/qemu/qemu_monitor_text.c b/src/qemu/qemu_monitor_text.c
index 414da0ca28..76095674ab 100644
--- a/src/qemu/qemu_monitor_text.c
+++ b/src/qemu/qemu_monitor_text.c
@@ -259,16 +259,17 @@ int qemuMonitorTextDeleteSnapshot(qemuMonitorPtr mon, const char *name)
     if (qemuMonitorHMPCommand(mon, cmd, &reply))
         goto cleanup;
 
-    if (strstr(reply, "No block device supports snapshots") != NULL) {
+    if (strstr(reply, "No block device supports snapshots")) {
         virReportError(VIR_ERR_OPERATION_INVALID, "%s",
                        _("this domain does not have a device to delete snapshots"));
         goto cleanup;
-    } else if (strstr(reply, "Snapshots not supported on device") != NULL) {
+    } else if (strstr(reply, "Snapshots not supported on device")) {
         virReportError(VIR_ERR_OPERATION_INVALID, "%s", reply);
         goto cleanup;
-    } else if (strstr(reply, "Error") != NULL
-             && strstr(reply, "while deleting snapshot") != NULL) {
-        virReportError(VIR_ERR_OPERATION_FAILED, "%s", reply);
+    } else if (strstr(reply, "Error") &&
+               strstr(reply, "while deleting snapshot")) {
+        virReportError(VIR_ERR_OPERATION_FAILED,
+                       _("Failed to delete snapshot: %s"), reply);
         goto cleanup;
     }
 
-- 
2.21.0

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