check !istream::good() instead of istream::bad() (not equivalent)

libcorpus2/io/cclreader.cpp

@@ -82,7 +82,7 @@ CclReader::CclReader(const Tagset& tagset, const std::string& filename, bool dis
 {
 	this->is_owned_.reset(new std::ifstream(filename.c_str(), std::ifstream::in));
 
-	if (this->is_owned_->bad()) {
+	if (!this->is_owned_->good()) {
 		throw Corpus2Error("File not found!");
 	}
 	else {

libcorpus2/io/fastxces.cpp

@@ -175,7 +175,7 @@ FastXcesReader::FastXcesReader(const Tagset &tagset, const std::string &filename
 {
 	this->is_owned_.reset(new std::ifstream(filename.c_str(), std::ifstream::in));
 
-	if (this->is_owned_->bad()) {
+	if (!this->is_owned_->good()) {
 		throw Corpus2Error("File not found!");
 	}
 	else {

libcorpus2/io/rft.cpp

@@ -116,7 +116,7 @@ RftReader::RftReader(const Tagset& tagset, const std::string& filename, bool dis
 	, mbt_dialect_(mbt_dialect)
 {
 	is_owned_.reset(new std::ifstream(filename.c_str(), std::ifstream::in));
-	if (this->is_owned_->bad()) {
+	if (!this->is_owned_->good()) {
 		throw Corpus2Error("File not found!");
 	}
 	else {

libcorpus2/io/xcesreader.cpp

@@ -52,8 +52,7 @@ XcesReader::XcesReader(const Tagset& tagset, const std::string& filename, bool d
 	impl_(new XcesReaderImpl(*this, chunk_buf_, disamb_only, disamb_sh))
 {
 	this->is_owned_.reset(new std::ifstream(filename.c_str(), std::ifstream::in));
-
-	if (this->is_owned_->bad()) {
+	if (!this->is_owned_->good()) {
 		throw Corpus2Error("File not found!");
 	}
 	else {