bug fix: handle paths with more than one component.

diff --git a/src/live_effects/lpe-knot.cpp b/src/live_effects/lpe-knot.cpp
index e369dcd95f6a7155db49cee75efd55a23291a82e..60371dce7e8ede45d04ffbafeafe7f34d8dbf258 100644 (file)
--- a/src/live_effects/lpe-knot.cpp
+++ b/src/live_effects/lpe-knot.cpp
@@ -58,10 +58,10 @@ std::vector<Geom::Interval> complementOf(Geom::Interval I, std::vector<Geom::Int
 
     for (unsigned i = 0; i<domain.size(); i++){
         boost::optional<Geom::Interval> I1i = intersect(domain.at(i),I1);
-        if (I1i) ret.push_back(I1i.get());
+        if (I1i && !I1i->isSingular()) ret.push_back(I1i.get());
         boost::optional<Geom::Interval> I2i = intersect(domain.at(i),I2);
-        if (I2i) ret.push_back(I2i.get());
-    }
+        if (I2i && !I2i->isSingular()) ret.push_back(I2i.get());
+    }    
     return ret;
 }