From: Thomas Goyne <plorkyeran@aegisub.org>
Date: Fri, 8 Apr 2016 13:29:32 -0700
Subject: Fix compilation with old versions of ffms2

---
 src/ffmpegsource_common.cpp | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/ffmpegsource_common.cpp b/src/ffmpegsource_common.cpp
index 11a5abd..6eaf75d 100644
--- a/src/ffmpegsource_common.cpp
+++ b/src/ffmpegsource_common.cpp
@@ -50,6 +50,20 @@
 #include <wx/intl.h>
 #include <wx/choicdlg.h>
 
+#if FFMS_VERSION < ((2 << 24) | (22 << 16) | (0 << 8) | 0)
+enum {
+	FFMS_LOG_QUIET = -8,
+	FFMS_LOG_PANIC = 0,
+	FFMS_LOG_FATAL = 8,
+	FFMS_LOG_ERROR = 16,
+	FFMS_LOG_WARNING = 24,
+	FFMS_LOG_INFO = 32,
+	FFMS_LOG_VERBOSE = 40,
+	FFMS_LOG_DEBUG = 48,
+	FFMS_LOG_TRACE = 56
+};
+#endif
+
 #ifdef _WIN32
 #include <objbase.h>