clang-tidy: some llvm- warnings

Signed-off-by: Rosen Penev <[email protected]>

Author: neheb

include/exiv2/bmffimage.hpp

@@ -14,7 +14,7 @@
 // namespace extensions
 namespace Exiv2 {
 EXIV2API bool enableBMFF(bool enable = true);
-}
+}  // namespace Exiv2
 
 #ifdef EXV_ENABLE_BMFF
 namespace Exiv2 {

include/exiv2/properties.hpp

@@ -8,6 +8,7 @@
 
 // included header files
 #include <mutex>
+
 #include "datasets.hpp"
 
 // *****************************************************************************