fix up SVAModifier constructors

2 files changed, 5 insertions, 4 deletions

diff --git a/libs/canvas/canvas/colors.h b/libs/canvas/canvas/colors.h
index dac14b437b..9bd8f89570 100644
--- a/libs/canvas/canvas/colors.h
+++ b/libs/canvas/canvas/colors.h
@@ -52,7 +52,8 @@ class LIBCANVAS_API SVAModifier
 
   public:
 	SVAModifier (std::string const &);
-	SVAModifier (double ss, double vv, double aa) : s (ss) , v (vv) , a (aa) {}
+	SVAModifier (Type t, double ss, double vv, double aa) : type (t), s (ss) , v (vv) , a (aa) {}
+	SVAModifier () : type (Add), s (0), v (0), a (0) {} /* no-op modifier */
 	
 	HSV operator () (HSV& hsv) const;
 	std::string to_string () const;
diff --git a/libs/canvas/colors.cc b/libs/canvas/colors.cc
index 19ab783b78..f955e13c05 100644
--- a/libs/canvas/colors.cc
+++ b/libs/canvas/colors.cc
@@ -529,9 +529,9 @@ HSV::mod (SVAModifier const & svam)
 
 SVAModifier::SVAModifier (string const &str)
 	: type (Add)
-	, s (-1.0)
-	, v (-1.0)
-	, a (-1.0)
+	, s (0)
+	, v (0)
+	, a (0)
 {
 	from_string (str);
 }