Coverity: uninitialized values in ExifEntry_t structure

modules/imgcodecs/src/jpeg_exif.cpp

@@ -52,6 +52,12 @@ namespace {
 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)
+{
+}
+
 /**
  * @brief ExifReader constructor
  */

modules/imgcodecs/src/jpeg_exif.hpp

@@ -111,6 +111,8 @@ typedef std::pair<uint32_t, uint32_t> u_rational_t;
  */
 struct ExifEntry_t
 {
+    ExifEntry_t();
+
     std::vector<u_rational_t> field_u_rational; ///< vector of rational fields
     std::string field_str;                      ///< any kind of textual information