Change reporting of CAPTURE'd variables

Info is not changed, intentionally.

Closes #639
diff --git a/include/catch.hpp b/include/catch.hpp
index 997f3cc..5d009ee 100644
--- a/include/catch.hpp
+++ b/include/catch.hpp
@@ -116,8 +116,8 @@
 #define CATCH_INFO( msg ) INTERNAL_CATCH_INFO( msg, "CATCH_INFO" )
 #define CATCH_WARN( msg ) INTERNAL_CATCH_MSG( Catch::ResultWas::Warning, Catch::ResultDisposition::ContinueOnFailure, "CATCH_WARN", msg )
 #define CATCH_SCOPED_INFO( msg ) INTERNAL_CATCH_INFO( msg, "CATCH_INFO" )
-#define CATCH_CAPTURE( msg ) INTERNAL_CATCH_INFO( #msg " := " << msg, "CATCH_CAPTURE" )
-#define CATCH_SCOPED_CAPTURE( msg ) INTERNAL_CATCH_INFO( #msg " := " << msg, "CATCH_CAPTURE" )
+#define CATCH_CAPTURE( msg ) INTERNAL_CATCH_INFO( #msg " := " << Catch::toString(msg), "CATCH_CAPTURE" )
+#define CATCH_SCOPED_CAPTURE( msg ) INTERNAL_CATCH_INFO( #msg " := " << Catch::toString(msg), "CATCH_CAPTURE" )
 
 #ifdef CATCH_CONFIG_VARIADIC_MACROS
     #define CATCH_TEST_CASE( ... ) INTERNAL_CATCH_TESTCASE( __VA_ARGS__ )
@@ -185,8 +185,8 @@
 #define INFO( msg ) INTERNAL_CATCH_INFO( msg, "INFO" )
 #define WARN( msg ) INTERNAL_CATCH_MSG( Catch::ResultWas::Warning, Catch::ResultDisposition::ContinueOnFailure, "WARN", msg )
 #define SCOPED_INFO( msg ) INTERNAL_CATCH_INFO( msg, "INFO" )
-#define CAPTURE( msg ) INTERNAL_CATCH_INFO( #msg " := " << msg, "CAPTURE" )
-#define SCOPED_CAPTURE( msg ) INTERNAL_CATCH_INFO( #msg " := " << msg, "CAPTURE" )
+#define CAPTURE( msg ) INTERNAL_CATCH_INFO( #msg " := " << Catch::toString(msg), "CAPTURE" )
+#define SCOPED_CAPTURE( msg ) INTERNAL_CATCH_INFO( #msg " := " << Catch::toString(msg), "CAPTURE" )
 
 #ifdef CATCH_CONFIG_VARIADIC_MACROS
     #define TEST_CASE( ... ) INTERNAL_CATCH_TESTCASE( __VA_ARGS__ )