configmgr: Use appropriate OUString functions on string constants

Change-Id: I7345234957aab62e884c0e884ac0b3b8a21e9cc5

configmgr/source/data.cxx

@@ -127,7 +127,7 @@ sal_Int32 Data::parseSegment(
     }
     if (templateName != 0) {
         if (i - index == 1 && path[index] == '*') {
-            *templateName = "";
+            templateName->clear();
         } else {
             *templateName = path.copy(index, i - index);
         }
@@ -245,7 +245,7 @@ rtl::Reference< Node > Data::resolvePathRepresentation(
             return p;
         }
         parent = p;
-        templateName = "";
+        templateName.clear();
         n = parseSegment(
             pathRepresentation, n, &seg, &setElement, &templateName);
         if (n == -1) {

configmgr/source/propertynode.cxx

@@ -56,7 +56,7 @@ css::uno::Any PropertyNode::getValue(Components & components) {
         if (val.IsPresent) {
             value_ = val.Value; //TODO: check value type
         }
-        externalDescriptor_ = ""; // must not throw
+        externalDescriptor_.clear(); // must not throw
     }
     SAL_WARN_IF(
         !(value_.hasValue() || nillable_), "configmgr",
@@ -67,13 +67,13 @@ css::uno::Any PropertyNode::getValue(Components & components) {
 void PropertyNode::setValue(int layer, css::uno::Any const & value) {
     setLayer(layer);
     value_ = value;
-    externalDescriptor_ = "";
+    externalDescriptor_.clear();
 }
 
 com::sun::star::uno::Any *PropertyNode::getValuePtr(int layer)
 {
     setLayer(layer);
-    externalDescriptor_ = "";
+    externalDescriptor_.clear();
     return &value_;
 }
 

configmgr/source/xcdparser.cxx

@@ -113,7 +113,7 @@ bool XcdParser::startElement(
                 return false;
             }
             state_ = STATE_DEPENDENCY;
-            dependencyFile_ = "";
+            dependencyFile_.clear();
             return true;
         }
         state_ = STATE_COMPONENTS;