Merged fix for PointSprite modes validity checks from master.

src/osg/State.cpp

@@ -18,6 +18,7 @@
 #include <osg/Drawable>
 #include <osg/ApplicationUsage>
 #include <osg/ContextData>
+#include <osg/PointSprite>
 #include <osg/os_utils>
 
 #include <sstream>
@@ -285,6 +286,18 @@ void State::initializeExtensionProcs()
         }
     }
 
+    // set the validity of Modes
+    if (false)
+    {
+        bool pointSpriteModeValid = _glExtensions->isPointSpriteModeSupported;
+
+    #if defined( OSG_GLES1_AVAILABLE ) //point sprites don't exist on es 2.0
+        setModeValidity(GL_POINT_SPRITE_OES, pointSpriteModeValid);
+    #else
+        setModeValidity(GL_POINT_SPRITE_ARB, pointSpriteModeValid);
+    #endif
+    }
+
 
     _extensionProcsInitialized = true;