mkvparser/mkvparser.h: remove stray semicolon

after GetColourSpace() function definition

Change-Id: Ia28f8085b34cbdc673ec532f3552c00c42ca7fc4
diff --git a/mkvparser/mkvparser.h b/mkvparser/mkvparser.h
index 9f296ed..848d01f 100644
--- a/mkvparser/mkvparser.h
+++ b/mkvparser/mkvparser.h
@@ -527,7 +527,7 @@
 
   Projection* GetProjection() const;
 
-  const char* GetColourSpace() const { return m_colour_space; };
+  const char* GetColourSpace() const { return m_colour_space; }
 
  private:
   long long m_width;