Populate ExtrusionPath::height correctly in case of bridge

lib/Slic3r/Layer/PerimeterGenerator.pm

@@ -368,7 +368,7 @@ sub _traverse_loops {
                     role            => EXTR_ROLE_OVERHANG_PERIMETER,
                     mm3_per_mm      => $self->_mm3_per_mm_overhang,
                     width           => $self->overhang_flow->width,
-                    height          => $self->layer_height,
+                    height          => $self->overhang_flow->height,
                 );
             }
             

xs/src/libslic3r/Flow.cpp

@@ -32,6 +32,7 @@ Flow::new_from_spacing(float spacing, float nozzle_diameter, float height, bool
     if (height <= 0 && !bridge) CONFESS("Invalid flow height supplied to new_from_spacing()");
 
     float w = Flow::_width_from_spacing(spacing, nozzle_diameter, height, bridge);
+    if (bridge) height = w;
     return Flow(w, height, nozzle_diameter, bridge);
 }