Bug fix to avoid core dump due to access to empty meshbuffers by CuteAlien.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@1436 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/CParticleAnimatedMeshSceneNodeEmitter.cpp

@@ -123,7 +123,10 @@ s32 CParticleAnimatedMeshSceneNodeEmitter::emitt(u32 now, u32 timeSinceLastCall,
 					randomMB = MBNumber;
 				}
 
-				u32 vertexNumber = os::Randomizer::rand() % frameMesh->getMeshBuffer(randomMB)->getVertexCount();
+				u32 vertexNumber = frameMesh->getMeshBuffer(randomMB)->getVertexCount();
+				if (!vertexNumber)
+					continue;
+				vertexNumber = os::Randomizer::rand() % vertexNumber;
 
 				p.pos = frameMesh->getMeshBuffer(randomMB)->getPosition(vertexNumber);
 				if( UseNormalDirection )

source/Irrlicht/CParticleMeshEmitter.cpp

@@ -116,7 +116,10 @@ s32 CParticleMeshEmitter::emitt(u32 now, u32 timeSinceLastCall, SParticle*& outA
 					randomMB = MBNumber;
 				}
 
-				u32 vertexNumber = os::Randomizer::rand() % Mesh->getMeshBuffer(randomMB)->getVertexCount();
+				u32 vertexNumber = Mesh->getMeshBuffer(randomMB)->getVertexCount();
+				if (!vertexNumber)
+					continue;
+				vertexNumber = os::Randomizer::rand() % vertexNumber;
 
 				p.pos = Mesh->getMeshBuffer(randomMB)->getPosition(vertexNumber);
 				if( UseNormalDirection )