misc. typo fixes

mostly non-user-facing but some doxy.

include/osg/Callback

@@ -72,7 +72,7 @@ class OSG_EXPORT Callback : public virtual Object {
 
         /** Invoke the callback, first parameter is the Object that the callback is attached to,
          *  the second parameter, the data, is typically the NodeVisitor that is invoking the callback.
-         *  The run(..) method may be overriden by users directly, or if the user is using one of the old
+         *  The run(..) method may be overridden by users directly, or if the user is using one of the old
          *  style callbacks such as NodeCallback or Drawable::UpdateCallback then you can just override
          *  the appropriate callback method on those callback subclasses.
          *  If you are implementing your own callback then one should call traverse() to make sure nested callbacks

include/osg/GLExtensions

@@ -747,7 +747,7 @@ class OSG_EXPORT GLExtensions : public osg::Referenced
         // debug extensions
         void (GL_APIENTRY * glObjectLabel) (GLenum identifier, GLuint name, GLsizei length, const GLchar* label);
 
-        /** convinience wrapper around glObjectLabel that calls glObjectLabel if it's supported and using std::string as a label parameter.*/
+        /** convenience wrapper around glObjectLabel that calls glObjectLabel if it's supported and using std::string as a label parameter.*/
         void debugObjectLabel(GLenum identifier, GLuint name, const std::string& label) const { if (glObjectLabel && !label.empty()) glObjectLabel(identifier, name, label.size(), label.c_str()); }
 };
 

include/osg/Geometry

@@ -129,7 +129,7 @@ class OSG_EXPORT Geometry : public Drawable
         unsigned int getPrimitiveSetIndex(const PrimitiveSet* primitiveset) const;
 
 
-        /** Convinience method that checks all the vertex arrays to make sure that the buffer objects are all assigned appropriate.*/
+        /** Convenience method that checks all the vertex arrays to make sure that the buffer objects are all assigned appropriate.*/
         void configureBufferObjects();
 
         /** return true if any arrays are shared.*/
@@ -279,7 +279,7 @@ class OSG_EXPORT Geometry : public Drawable
 #endif
 };
 
-/** Convinience visitor for making sure that any BufferObjects that might be required are set up in the scene graph.*/
+/** Convenience visitor for making sure that any BufferObjects that might be required are set up in the scene graph.*/
 class ConfigureBufferObjectsVisitor : public osg::NodeVisitor
 {
 public:

include/osg/Shape

@@ -747,7 +747,7 @@ class TessellationHints : public Object
 // forward declare;
 class Geometry;
 
-/** Convinience class for populating an Geomtry with vertex, normals, texture coords and primitives that can render a Shape. */
+/** Convenience class for populating an Geomtry with vertex, normals, texture coords and primitives that can render a Shape. */
 class OSG_EXPORT BuildShapeGeometryVisitor : public ConstShapeVisitor
 {
     public: