!486 图片数据释放后把data置为nullptr

Merge pull request !486 from wangtiantian/bug_image_m

frameworks/imgdecode/file_img_decoder.cpp

@@ -114,6 +114,7 @@ RetCode FileImgDecoder::ReadToCache(ImgResDsc& dsc)
         uint32_t pxCount = info.st_size - readCount;
         if (dsc.imgInfo.data != nullptr) {
             ImageCacheFree(dsc.imgInfo);
+            dsc.imgInfo.data = nullptr;
         }
 
         bool readSuccess = false;
@@ -130,6 +131,7 @@ RetCode FileImgDecoder::ReadToCache(ImgResDsc& dsc)
         }
         if (!readSuccess) {
             ImageCacheFree(dsc.imgInfo);
+            dsc.imgInfo.data = nullptr;
             dsc.imgInfo.dataSize = 0;
             close(dsc.fd);
             dsc.fd = -1;

frameworks/imgdecode/image_load.cpp

@@ -114,6 +114,7 @@ bool ImageLoad::UnzipImage(uint8_t* imageBuffer, uint32_t size, ImageInfo& image
         return true;
     }
     ImageCacheFree(imageInfo);
+    imageInfo.data = nullptr;
     return false;
 }
 
@@ -170,6 +171,7 @@ bool ImageLoad::Unzip24Image(uint8_t* imageBuffer, uint32_t size, ImageInfo& ima
         return true;
     }
     ImageCacheFree(imageInfo);
+    imageInfo.data = nullptr;
     return false;
 }