fixed new font rendering on Linux and removed glew dependency

source/shared_lib/include/graphics/freetype-gl/vertex-buffer.h

@@ -33,21 +33,23 @@
 #ifndef __VERTEX_BUFFER_H__
 #define __VERTEX_BUFFER_H__
 
-#if defined(__APPLE__)
-    //#include <Glut/glut.h>
-#elif defined(_WIN32)
+#if defined(_WIN32)
 
 #define	WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #include <GL/glew.h>
 
 #else
-    //#include <GL/glut.h>
+    #include <GL/glu.h>
 #endif
 #include "vector.h"
 
 #define MAX_VERTEX_ATTRIBUTE 64
 
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
 /**
  *  Generic vertex attribute.
  */
@@ -471,4 +473,9 @@ vertex_attribute_new( GLenum target,
   GL_TYPE_STRING( GLenum gtype );
 
 
+#ifdef	__cplusplus
+}
+#endif
+
+
 #endif /* __VERTEX_BUFFER_H__ */