Implement tracer += operator logic.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8454 c06c8d41-db1a-0410-9941-cceddc491573

1 files changed, 7 insertions, 0 deletions

diff --git a/crawl-ref/source/beam.cc b/crawl-ref/source/beam.cc
index ec592b478c..bf48e44b0a 100644
--- a/crawl-ref/source/beam.cc
+++ b/crawl-ref/source/beam.cc
@@ -84,6 +84,13 @@ void tracer_info::reset()
 
 const tracer_info& tracer_info::operator+=(const tracer_info &other)
 {
+    count  += other.count;
+    power  += other.power;
+    hurt   += other.hurt;
+    helped += other.helped;
+
+    dont_stop = dont_stop || other.dont_stop;
+
     return (*this);
 }