compile error fixed

include/Novelec_MCCE2.h

@@ -86,7 +86,9 @@ public:
 	*/
 	std::string electrometer_status		(void);
 
-  virtual std::vector<std::string> ranges_list(void) {};
+  virtual std::vector<std::string> ranges_list(void) {
+  	return std::vector<std::string>() ;
+  };
 
 
 protected :

pom.xml

@@ -8,7 +8,7 @@
    </parent>
    <groupId>fr.soleil.lib</groupId>
    <artifactId>Electrometers-${aol}-${library}-${mode}</artifactId>
-   <version>2.7.0</version>
+   <version>2.7.1</version>
    <packaging>nar</packaging>
    <name>Electrometers library</name>
    <description>Electrometers library</description>