Print available asset decoders in mkxp

print_dec.patch

diff --git a/src/debugwriter.h b/src/debugwriter.h
index 27244d1..c7b10ed 100644
--- a/src/debugwriter.h
+++ b/src/debugwriter.h
@@ -24,6 +24,7 @@
 
 #include <iostream>
 #include <sstream>
+#include <vector>
 
 /* A cheap replacement for qDebug() */
 
@@ -44,6 +45,15 @@ public:
 		return *this;
 	}
 
+	template<typename T>
+	Debug &operator<<(const std::vector<T> &v)
+	{
+		for (size_t i = 0; i < v.size(); ++i)
+			buf << v[i] << " ";
+
+		return *this;
+	}
+
 	~Debug()
 	{
 		std::clog << buf.str() << std::endl;
diff --git a/src/filesystem.cpp b/src/filesystem.cpp
index 6a731ce..6b5e57f 100644
--- a/src/filesystem.cpp
+++ b/src/filesystem.cpp
@@ -801,6 +801,11 @@ FileSystem::FileSystem(const char *argv0,
 	p->extensions[Font].push_back("ttf");
 	p->extensions[Font].push_back("otf");
 
+	Debug() << "Available decoders:";
+	Debug() << "Image:" << p->extensions[Image];
+	Debug() << "Audio:" << p->extensions[Audio];
+	Debug() << "Font: " << p->extensions[Font];
+
 	PHYSFS_init(argv0);
 	PHYSFS_registerArchiver(&RGSS_Archiver);