math: fixed power function

Corrected shader code and fixed bug in widget bridge that reported an
incorrect index.

app/node/math/math/mathbase.cpp

@@ -65,7 +65,16 @@ ShaderCode MathNodeBase::GetShaderCodeInternal(const QString &shader_id, NodeInp
       operation = QStringLiteral("%1 / %2");
       break;
     case kOpPower:
-      operation = QStringLiteral("pow(%1, %2)");
+      if (pairing == kPairTextureNumber) {
+        // The "number" in this operation has to be declared a vec4
+        if (type_a & NodeParam::kNumber) {
+          operation = QStringLiteral("pow(%2, vec4(%1))");
+        } else {
+          operation = QStringLiteral("pow(%1, vec4(%2))");
+        }
+      } else {
+        operation = QStringLiteral("pow(%1, %2)");
+      }
       break;
     }
 

app/widget/nodeparamview/nodeparamviewwidgetbridge.cpp

@@ -363,7 +363,17 @@ void NodeParamViewWidgetBridge::WidgetCallback()
   case NodeParam::kCombo:
   {
     // Widget is a QComboBox
-    SetInputValue(static_cast<QComboBox*>(widgets_.first())->currentIndex(), 0);
+    QComboBox* cb = static_cast<QComboBox*>(widgets_.first());
+    int index = cb->currentIndex();
+
+    // Subtract any splitters up until this point
+    for (int i=index-1; i>=0; i--) {
+      if (cb->itemData(i, Qt::AccessibleDescriptionRole).toString() == QStringLiteral("separator")) {
+        index--;
+      }
+    }
+
+    SetInputValue(index, 0);
     break;
   }
   }