manager: reduce scope of variable

The lsess variable can have a smaller scope.

Change-Id: I79aa84b25b52708c8c35ed1a56dbfe89dabd29fb
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/manager.cpp b/manager.cpp
index 32fdd74..a64300c 100644
--- a/manager.cpp
+++ b/manager.cpp
@@ -334,7 +334,6 @@
 bool BlobManager::getSession(uint16_t* sess)
 {
     uint16_t tries = 0;
-    uint16_t lsess;
 
     if (!sess)
     {
@@ -348,7 +347,7 @@
      */
     do
     {
-        lsess = next++;
+        uint16_t lsess = next++;
         if (!sessions.count(lsess))
         {
             /* value not in use, return it. */