Fix beams not being show when targetting.

This was because directn.cc silently assumes find_ray returns
true when source == target...

1 files changed, 4 insertions, 1 deletions

diff --git a/crawl-ref/source/los.cc b/crawl-ref/source/los.cc
index d5f5e9a84a..586b96b7ad 100644
--- a/crawl-ref/source/los.cc
+++ b/crawl-ref/source/los.cc
@@ -682,7 +682,10 @@ bool find_ray(const coord_def& source, const coord_def& target,
               bool find_shortest, bool ignore_solid)
 {
     if (target == source)
-        return false;
+    {
+        // XXX: directn expects true, even if the ray is invalid
+        return true;
+    }
 
     const int signx = ((target.x - source.x >= 0) ? 1 : -1);
     const int signy = ((target.y - source.y >= 0) ? 1 : -1);