fixed g3d viewer (to use glew)

source/g3d_viewer/main.cpp

@@ -490,6 +490,14 @@ void MainWindow::init() {
 #else
 	glCanvas->SetCurrent();
 #endif
+
+	 GLuint err = glewInit();
+	 if (GLEW_OK != err) {
+		fprintf(stderr, "Error [main]: glewInit failed: %s\n", glewGetErrorString(err));
+		//return 1;
+		throw std::runtime_error((char *)glewGetErrorString(err));
+	 }
+
 	//renderer->init();
 
 	//wxCommandEvent event;

source/g3d_viewer/main.h

@@ -3,6 +3,7 @@
 
 #include <string>
 
+#include <GL/glew.h>
 #include <wx/wx.h>
 #include <wx/glcanvas.h>
 //#include <wx/clrpicker.h>