Fixed == operator for empty string comparison.

MString.h

@@ -6,8 +6,7 @@
 #include <sstream>
 #include <ostream>
 
-namespace coreutils
-{
+namespace coreutils {
    
    ///
    /// Use the MString object when you need a permanent backing store on the heap
@@ -42,12 +41,15 @@ namespace coreutils
       
       MString(const unsigned char *data, size_t length);
 
-      MString (ZString zstring);
+//      MString (ZString zstring);
       
       ///
       /// Consructor providing a copy of a ZString.
       ///
       
+      MString (ZString &zstring);
+      MString (const ZString &zstring);
+
       ///
       /// Consructor providing a copy of a ZString.
       ///