Fixed crash bug related to CCLabelBMFonts

- cocos2d#3

Author: Patrick Collins

cocos2d/CCDrawNode.m

@@ -162,7 +162,8 @@ -(void)dealloc
 
 	glDeleteBuffers(1, &_vbo); _vbo = 0;
 	glDeleteVertexArrays(1, &_vao); _vao = 0;
-	
+	ccGLBindVAO(0);
+
 	[super dealloc];
 }
 

cocos2d/CCParticleSystemQuad.m

@@ -162,6 +162,7 @@ - (void) setTotalParticles:(NSUInteger)tp
 		// clean VAO
 		glDeleteBuffers(2, &_buffersVBO[0]);
 		glDeleteVertexArrays(1, &_VAOname);
+        ccGLBindVAO(0);
 
         [self initVAO];
     }
@@ -227,6 +228,7 @@ -(void) dealloc
 
 		glDeleteBuffers(2, &_buffersVBO[0]);
 		glDeleteVertexArrays(1, &_VAOname);
+        ccGLBindVAO(0);
 	}
 
 	[super dealloc];
@@ -489,6 +491,7 @@ -(void) setBatchNode:(CCParticleBatchNode *)batchNode
 
 			glDeleteBuffers(2, &_buffersVBO[0]);
 			glDeleteVertexArrays(1, &_VAOname);
+            ccGLBindVAO(0);
 		}
 	}
 }

cocos2d/CCTextureAtlas.m

@@ -140,6 +140,7 @@ -(void) dealloc
 
 #if CC_TEXTURE_ATLAS_USE_VAO
 	glDeleteVertexArrays(1, &_VAOname);
+    ccGLBindVAO(0);
 #endif
 
 	[_texture release];