implemented "value hints" for choosing output values to use

app/node/math/math/mathbase.cpp

@@ -359,6 +359,8 @@ void MathNodeBase::ValueInternal(Operation operation, Pairing pairing, const QSt
       } else {
         output->Push(NodeValue::kSampleJob, QVariant::fromValue(job), this);
       }
+    } else {
+      output->Push(NodeValue::kSampleJob, QVariant::fromValue(job), this);
     }
     break;
   }

app/node/math/merge/merge.cpp

@@ -116,7 +116,7 @@ void MergeNode::Hash(const ValueHint &output, QCryptographicHash &hash, const No
 
     if (!passthrough_base && !passthrough_blend) {
       // This merge will actually do something so we add a fingerprint
-      HashAddNodeSignature(hash, output);
+      HashAddNodeSignature(hash);
     }
 
     if (!passthrough_base) {