debugger plugin: fix computation of memory occupation differences.

diff --git a/data/rbot/plugins/debugger.rb b/data/rbot/plugins/debugger.rb
index 6eabdfea257c5819b326b87ec5c20e4b5c9d59d1..fe000324e8383118dd898d54588e05f3172321ba 100644 (file)
--- a/data/rbot/plugins/debugger.rb
+++ b/data/rbot/plugins/debugger.rb
@@ -48,7 +48,7 @@ class DebugPlugin < Plugin
           end
 
           @delta.clear
-          (@curr.keys + @delta.keys).uniq.each do |k,v|
+          (@curr.keys + @prev.keys).uniq.each do |k,v|
             @delta[k] = @curr[k]-@prev[k]
           end