Updated love.filesystem's C library loader for require to look in paths added via love.filesystem.mount, when in fused mode

src/modules/filesystem/physfs/Filesystem.h

@@ -166,6 +166,11 @@ public:
 	 **/
 	std::string getSourceBaseDirectory() const;
 
+	/**
+	 * Gets the real directory path containing the file.
+	 **/
+	std::string getRealDirectory(const char *filename) const;
+
 	/**
 	 * Checks whether a file exists in the current search path
 	 * or not.