Fix FTBFS when using libexiv2 0.28.0. This resolves issue #7.

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>

src/imageutils/jpegcontent.cpp

@@ -264,7 +264,11 @@ bool JPEGContent::loadFromData(const TQByteArray& data) {
 
 	if (!d->readSize()) return false;
 
+#if (EXIV2_TEST_VERSION(0,28,0))
+	Exiv2::Image::UniquePtr image;
+#else
 	Exiv2::Image::AutoPtr image;
+#endif
 	try {
 		image = Exiv2::ImageFactory::open((unsigned char*)data.data(), data.size());
 		image->readMetadata();
@@ -303,7 +307,11 @@ Orientation JPEGContent::orientation() const {
 	if (it == d->mExifData.end()) {
 		return NOT_AVAILABLE;
 	}
+#if (EXIV2_TEST_VERSION(0,28,0))
+	return Orientation( it->toInt64() );
+#else
 	return Orientation( it->toLong() );
+#endif
 }
 
 
@@ -323,7 +331,11 @@ int JPEGContent::dotsPerMeter(const TQString& keyName) const {
 	if (it == d->mExifData.end()) {
 		return 0;
 	}
-	int res = it->toLong();
+#if (EXIV2_TEST_VERSION(0,28,0))
+	int64_t res = it->toInt64();
+#else
+	long res = it->toLong();
+#endif
 	TQString keyVal = "Exif.Image." + keyName;
 	Exiv2::ExifKey keyResolution(keyVal.ascii());
 	it = d->mExifData.findKey(keyResolution);
@@ -604,7 +616,11 @@ TQImage JPEGContent::thumbnail() const {
 	if (!d->mExifData.empty()) {
 		Exiv2::ExifThumbC thumb(d->mExifData);
 		Exiv2::DataBuf const thumbnail = thumb.copy();
+#if (EXIV2_TEST_VERSION(0,28,0))
+		image.loadFromData(thumbnail.c_data(), thumbnail.size());
+#else
 		image.loadFromData(thumbnail.pData_, thumbnail.size_);
+#endif
 	}
 	return image;
 }
@@ -652,7 +668,11 @@ bool JPEGContent::save(TQFile* file) {
 		d->mPendingTransformation = false;
 	}
 
+#if (EXIV2_TEST_VERSION(0,28,0))
+	Exiv2::Image::UniquePtr image = Exiv2::ImageFactory::open((unsigned char*)d->mRawData.data(), d->mRawData.size());
+#else
 	Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open((unsigned char*)d->mRawData.data(), d->mRawData.size());
+#endif
 
 	// Store Exif info
 	image->setExifData(d->mExifData);