Introduced usage of OSG_GLES*_AVAILABLE macros to headers and .cpp's to enable building against OpenGL ES 1.x and 2.x headers

src/osg/LightModel.cpp

@@ -51,6 +51,11 @@ LightModel::~LightModel()
 void LightModel::apply(State&) const
 {
 #ifdef OSG_GL_FIXED_FUNCTION_AVAILABLE
+
+    #ifdef OSG_GLES1_AVAILABLE
+    #define glLightModeli glLightModelx
+    #endif
+
     glLightModelfv(GL_LIGHT_MODEL_AMBIENT,_ambient.ptr());
 
     static bool s_separateSpecularSupported = strncmp((const char*)glGetString(GL_VERSION),"1.2",3)>=0;
@@ -66,7 +71,10 @@ void LightModel::apply(State&) const
         }
     }
     
+    #ifndef OSG_GLES1_AVAILABLE
     glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER,_localViewer);
+    #endif
+
     glLightModeli(GL_LIGHT_MODEL_TWO_SIDE,_twoSided);
 #else
     osg::notify(osg::NOTICE)<<"Warning: LightModel::apply(State&) - not supported."<<std::endl;