Fixed a setInputFrameBuffer issue in GPUImageThreeInputFilter
Fixed a setInputFrameBuffer issue in GPUImageThreeInputFilter

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92/GPUImage,eunmin/GPUImage,HSFGitHub/GPUImage,xqz001/GPUImage,Lcarvajal/GPUImage,mtxs007/GPUImage,sprint84/GPUImage,efremidze/GPUImage,PlanetaToBe/GPUImage,SanjoDeundiak/GPUImage,Matzo/GPUImage,u-engine/GPUImage,gank0326/GPUImage,937447974/GPUImage,StratAguilar/GPUImage,hoanganhx86/GPUImage,Matzo/GPUImage,IncredibleDucky/GPUImage,RavishankarDuMCA10/GPUImage,pengleelove/GPUImage,AlanJN/GPUImage,jsharp83/GPUImage,gank0326/GPUImage,lily4ever/GPUImage,0x4d52/GPUImage,hakanw/GPUImage,YuAo/GPUImage,howandhao/GPUImage,rromanchuk/GPUImage,cocologics/GPUImage,0x4d52/GPUImage,nonoBruce/GPUImage,wfxiang08/GPUImage,lauraskelton/GPUImage,appone/GPUImage,3drobotics/GPUImage,PodRepo/GPUImage,BlessNeo/GPUImage,rromanchuk/GPUImage,tuo/GPUImage,UltravisualApp/GPUImage,devluyy/GPUImage,msfeldstein/GPUImage,pengleelove/GPUImage,KBvsMJ/GPUImage,Learn-IOS/GPUImage,Creolophus/GPUImage,haikusw/GPUImage,powerhome/GPUImage,horaceho/GPUImage,duanhjlt/GPUImage