forward-port fatal-error-saving fix for xfade loading from 2.X

git-svn-id: svn://localhost/ardour2/branches/3.0@8194 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 10 insertions, 0 deletions

diff --git a/libs/ardour/crossfade.cc b/libs/ardour/crossfade.cc
index d2271030a5..b22dd15c9c 100644
--- a/libs/ardour/crossfade.cc
+++ b/libs/ardour/crossfade.cc
@@ -868,6 +868,11 @@ Crossfade::set_state (const XMLNode& node, int /*version*/)
 		}
 	}
 
+        if (_fade_in.size() < 2) {
+                /* fade state somehow saved with no points */
+                return -1;
+        }
+
         _fade_in.front()->value = 0.0;
         _fade_in.back()->value = 1.0;
 
@@ -896,6 +901,11 @@ Crossfade::set_state (const XMLNode& node, int /*version*/)
 		}
 	}
 
+        if (_fade_out.size() < 2) {
+                /* fade state somehow saved with no points */
+                return -1;
+        }
+
         _fade_out.front()->value = 1.0;
         _fade_out.back()->value = 0.0;