fix premult by alpha output

Author: charlesangus

src/DeepCMWrapper.cpp

@@ -85,7 +85,7 @@ void DeepCMWrapper::top_knobs(Knob_Callback f)
     "presumably store position data (and all other data) premultiplied, "
     "as required by the Deep spec.");
     Input_ChannelSet_knob(f, &_processChannelSet, 0, "output");
-    Bool_knob(f, &_premultOutput, "premult_output", "premult output");
+    Bool_knob(f, &_unpremult, "unpremult", "(un)premult by alpha");
     Tooltip(f, "If, for some reason, you want your mask stored without "
     "premultipling it, contrary to the Deep spec, uncheck this. "
     "Should probably always be checked.");

src/DeepCMWrapper.h

@@ -23,9 +23,7 @@ class DeepCMWrapper : public DeepCWrapper
         // can override in child classes to change the name of the aux channel knob
         const char* _auxChannelKnobName;
 
-        // ChannelSet _processChannelSet;
         ChannelSet _auxiliaryChannelSet;
-        bool _premultOutput;
         bool _unpremultPosition;
 
         int _operation;
@@ -35,7 +33,7 @@ class DeepCMWrapper : public DeepCWrapper
         DeepCMWrapper(Node* node) : DeepCWrapper(node)
             , _auxChannelKnobName("input_data")
             , _auxiliaryChannelSet(Chan_Black)
-            , _premultOutput(true)
+            // , _premultOutput(true)
             , _unpremultPosition(true)
             , _operation(0)
         {