Added the ability for osgParticle::ParticleEffect to switch off the automatic setup.

Normally the automatic setup is useful, but in the case of the .osg support this automatic
update was forcing premature loading of imagery that wasn't necessarily, and can lead to
reports of looking for files that arn't present.

src/osgPlugins/osgParticle/IO_ParticleEffect.cpp

@@ -177,7 +177,14 @@ bool ParticleEffect_readLocalData(osg::Object& object, osgDB::Input& fr)
         }
     }
 
-
+    if (!effect.getAutomaticSetup())
+    {
+        // since by default the clone of the ParticleEffect is done with automatic setup off to prevent premature loading of
+        // imagery, we still want to make sure the ParticleEffect is properly built so we'll now mannually enable the automatic setup
+        // run the buildEffect().
+        effect.setAutomaticSetup(true);
+        effect.buildEffect();
+    }
 
     return itrAdvanced;
 }