From Eric Wing, made getLineCount() const.

include/osgText/Text

@@ -216,7 +216,7 @@ public:
     KerningType getKerningType() const { return _kerningType; }
 
     /** Get the number of wrapped lines - only valid after computeGlyphRepresentation() has been called, returns 0 otherwise */
-    unsigned int getLineCount() { return _lineCount; }
+    unsigned int getLineCount() const { return _lineCount; }
     
     /** Draw the text.*/
     virtual void drawImplementation(osg::State& state) const;