Added #define's and local include<osg/Image> to fix Windows GL 1.1 build against

include/osg/Image

@@ -85,6 +85,13 @@
     #define GL_PACK_ROW_LENGTH      0x0D02
 #endif
 
+#ifndef GL_PACK_SKIP_IMAGES
+    #define GL_PACK_SKIP_IMAGES     0x806B
+    #define GL_PACK_IMAGE_HEIGHT    0x806C
+    #define GL_UNPACK_SKIP_IMAGES   0x806D
+    #define GL_UNPACK_IMAGE_HEIGHT  0x806E
+#endif
+
 namespace osg {
 
 // forward declare

src/osg/glu/libutil/error.cpp

@@ -32,6 +32,10 @@
 
 // #include "gluos.h"
 
+#ifndef GL_TABLE_TOO_LARGE
+    #define GL_TABLE_TOO_LARGE  0x8031
+#endif
+
 static unsigned char *__gluNurbsErrors[] = {
     (unsigned char*) " ",
     (unsigned char*) "spline order un-supported",

src/osg/glu/libutil/mipmap.cpp

@@ -29,6 +29,7 @@
  */
 
 #include <osg/GLU>
+#include <osg/Image>
 
 // #include "gluos.h"
 // #include <GL/glu.h>