Merge pull request #795 from xlchen/master

fix duplicate symbols when using with webp via pods

SDWebImage/UIImage+WebP.m

@@ -58,8 +58,11 @@ static void FreeImageData(void *info, const void *data, size_t size)
 
 @end
 
+#if !COCOAPODS
 // Functions to resolve some undefined symbols when using WebP and force_load flag
 void WebPInitPremultiplyNEON(void) {}
 void WebPInitUpsamplersNEON(void) {}
 void VP8DspInitNEON(void) {}
 #endif
+
+#endif