hold HeifPixelImage memory in uint8_t* instead of void*

Author: farindk

libheif/pixelimage.cc

@@ -207,8 +207,8 @@ bool HeifPixelImage::ImagePlane::alloc(int width, int height, heif_channel_datat
   stride = (stride + alignment - 1U) & ~(alignment - 1U);
 
   try {
-    uint8_t* allocated_mem_8 = new uint8_t[m_mem_height * stride + alignment - 1];
-    uint8_t* mem_8 = allocated_mem_8;
+    allocated_mem = new uint8_t[m_mem_height * stride + alignment - 1];
+    uint8_t* mem_8 = allocated_mem;
 
     // shift beginning of image data to aligned memory position
 
@@ -219,7 +219,6 @@ bool HeifPixelImage::ImagePlane::alloc(int width, int height, heif_channel_datat
     }
 
     mem = mem_8;
-    allocated_mem = allocated_mem_8;
 
     return true;
   }

libheif/pixelimage.h

@@ -188,7 +188,7 @@ class HeifPixelImage : public std::enable_shared_from_this<HeifPixelImage>,
     int m_mem_height = 0;
 
     void* mem = nullptr; // aligned memory start
-    void* allocated_mem = nullptr; // unaligned memory we allocated
+    uint8_t* allocated_mem = nullptr; // unaligned memory we allocated
     uint32_t stride = 0; // bytes per line
 
     int get_bytes_per_pixel() const;