fix several gcc warnings

src/Base/FileInfo.cpp

@@ -272,10 +272,8 @@ std::wstring FileInfo::toStdWString() const
 #endif
 }
 
-std::string FileInfo::extension (bool complete) const
+std::string FileInfo::extension () const
 {
-    // complete not implemented
-    assert(complete==false);
     std::string::size_type pos = FileName.find_last_of('.');
     if (pos == std::string::npos)
         return std::string();

src/Base/FileInfo.h

@@ -82,7 +82,7 @@ public:
      *  ext = fi.extension();   // ext = "gz"
      *@endcode
      */
-    std::string extension (bool complete = false) const;
+    std::string extension () const;
     /// Checks for a special extension, NOT case sensetive
     bool hasExtension (const char* Ext) const;
     //@}