mesa: Include missing header in m_matrix.h.

diff --git a/src/mesa/math/m_matrix.h b/src/mesa/math/m_matrix.h
index 3bc5de6cd4dde8b5ed33698ed343a1834a1a45b8..a69afb8589adc8d03c06cca973e6c1a62db0236a 100644 (file)
--- a/src/mesa/math/m_matrix.h
+++ b/src/mesa/math/m_matrix.h
@@ -32,6 +32,8 @@
 #define _M_MATRIX_H
 
 
+#include "main/glheader.h"
+
 
 /**
  * \name Symbolic names to some of the entries in the matrix