Try to fix some warnings.

3 files changed, 9 insertions, 10 deletions

diff --git a/src/lib/content.cc b/src/lib/content.cc
index b288580cb..ca76b01a6 100644
--- a/src/lib/content.cc
+++ b/src/lib/content.cc
@@ -205,7 +205,7 @@ Content::signal_change (ChangeType c, int p)
 		} else {
 			emit (boost::bind (boost::ref(Change), c, shared_from_this(), p, _change_signals_frequent));
 		}
-	} catch (boost::bad_weak_ptr) {
+	} catch (boost::bad_weak_ptr &) {
 		/* This must be during construction; never mind */
 	}
 }
diff --git a/src/lib/dcp_content.cc b/src/lib/dcp_content.cc
index 469021d96..4c4486a28 100644
--- a/src/lib/dcp_content.cc
+++ b/src/lib/dcp_content.cc
@@ -547,10 +547,10 @@ DCPContent::can_reference (shared_ptr<const Film> film, function<bool (shared_pt
 	list<DCPTimePeriod> reel_list;
 	try {
 		reel_list = reels (film);
-	} catch (dcp::DCPReadError) {
+	} catch (dcp::DCPReadError &) {
 		/* We couldn't read the DCP; it's probably missing */
 		return false;
-	} catch (dcp::KDMDecryptionError) {
+	} catch (dcp::KDMDecryptionError &) {
 		/* We have an incorrect KDM */
 		return false;
 	}
@@ -625,13 +625,13 @@ DCPContent::can_reference_audio (shared_ptr<const Film> film, string& why_not) c
 	shared_ptr<DCPDecoder> decoder;
 	try {
 		decoder.reset (new DCPDecoder (film, shared_from_this(), false));
-	} catch (dcp::DCPReadError) {
+	} catch (dcp::DCPReadError &) {
 		/* We couldn't read the DCP, so it's probably missing */
 		return false;
-	} catch (DCPError) {
+	} catch (DCPError &) {
 		/* We couldn't read the DCP, so it's probably missing */
 		return false;
-	} catch (dcp::KDMDecryptionError) {
+	} catch (dcp::KDMDecryptionError &) {
 		/* We have an incorrect KDM */
 		return false;
 	}
@@ -660,11 +660,10 @@ DCPContent::can_reference_text (shared_ptr<const Film> film, TextType type, stri
 	shared_ptr<DCPDecoder> decoder;
 	try {
 		decoder.reset (new DCPDecoder (film, shared_from_this(), false));
-	} catch (dcp::DCPReadError) {
-
+	} catch (dcp::DCPReadError &) {
 		/* We couldn't read the DCP, so it's probably missing */
 		return false;
-	} catch (dcp::KDMDecryptionError) {
+	} catch (dcp::KDMDecryptionError &) {
 		/* We have an incorrect KDM */
 		return false;
 	}
diff --git a/src/lib/util.cc b/src/lib/util.cc
index 544045bcb..0b6f4be72 100644
--- a/src/lib/util.cc
+++ b/src/lib/util.cc
@@ -726,7 +726,7 @@ relaxed_string_to_float (string s)
 	try {
 		boost::algorithm::replace_all (s, ",", ".");
 		return lexical_cast<float> (s);
-	} catch (bad_lexical_cast) {
+	} catch (bad_lexical_cast &) {
 		boost::algorithm::replace_all (s, ".", ",");
 		return lexical_cast<float> (s);
 	}