Merge pull request #7165 from timur-losev/v3

- Due to the fact that map::insert doesn't allow to insert an element by...

cocos/renderer/CCGLProgramCache.cpp

@@ -387,8 +387,10 @@ GLProgram* GLProgramCache::getGLProgram(const std::string &key)
 
 void GLProgramCache::addGLProgram(GLProgram* program, const std::string &key)
 {
+    if (program)
         program->retain();
-    _programs.insert( std::make_pair( key, program) );
+    
+    _programs[key] = program;
 }
 
 NS_CC_END