Coverity: fixed uninitialized field in ExifReader

modules/imgcodecs/src/grfmt_jpeg.cpp

@@ -270,7 +270,11 @@ int JpegDecoder::getOrientation()
     ExifReader reader( m_filename );
     if( reader.parse() )
     {
-        orientation = reader.getTag( ORIENTATION ).field_u16;//orientation is unsigned short, so check field_u16
+        ExifEntry_t entry = reader.getTag( ORIENTATION );
+        if (entry.tag != INVALID_TAG)
+        {
+            orientation = entry.field_u16; //orientation is unsigned short, so check field_u16
+        }
     }
 
     return orientation;

modules/imgcodecs/src/jpeg_exif.cpp

@@ -54,14 +54,14 @@ namespace cv
 
 ExifEntry_t::ExifEntry_t() :
     field_float(0), field_double(0), field_u32(0), field_s32(0),
-    tag(0), field_u16(0), field_s16(0), field_u8(0), field_s8(0)
+    tag(INVALID_TAG), field_u16(0), field_s16(0), field_u8(0), field_s8(0)
 {
 }
 
 /**
  * @brief ExifReader constructor
  */
-ExifReader::ExifReader(std::string filename) : m_filename(filename)
+ExifReader::ExifReader(std::string filename) : m_filename(filename), m_format(NONE)
 {
 }