librbd: fix warning

librbd/librbd.cc: In member function 'int librbd::Image::metadata_get(const string&, std::string*)':
librbd/librbd.cc:845:76: warning: suggest braces around empty body in an 'else' statement [-Wempty-body]

Signed-off-by: Sage Weil <sage@redhat.com>

diff --git a/src/librbd/librbd.cc b/src/librbd/librbd.cc
index 4bdaf4311d781c5bc2abfe38e4eb1f62128afbf6..6d59872f30386fe6cdb55e14ef42d8785fc5d9d4 100644 (file)
--- a/src/librbd/librbd.cc
+++ b/src/librbd/librbd.cc
@@ -839,10 +839,11 @@ namespace librbd {
     ImageCtx *ictx = (ImageCtx *)ctx;
     tracepoint(librbd, metadata_get_enter, ictx, key.c_str());
     int r = librbd::metadata_get(ictx, key, value);
-    if (r < 0)
+    if (r < 0) {
       tracepoint(librbd, metadata_get_exit, r, key.c_str(), NULL);
-    else
+    } else {
       tracepoint(librbd, metadata_get_exit, r, key.c_str(), value->c_str());
+    }
     return r;
   }