Moved the extern "C" { } until after all the includes have been done.

Math/mat3.h

@@ -7,10 +7,6 @@
 #ifndef MAT3_HAS_BEEN_INCLUDED
 #define MAT3_HAS_BEEN_INCLUDED
 
-#ifdef __cplusplus                                                          
-extern "C" {                            
-#endif                                   
-
 /* -----------------------------  Constants  ------------------------------ */
 
 /*
@@ -23,6 +19,11 @@ extern "C" {
 #include <stdio.h>
 
 
+#ifdef __cplusplus                                                          
+extern "C" {                            
+#endif                                   
+
+
 #define MAT3_DET0	-1			/* Indicates singular mat */
 #define MAT3_EPSILON	1e-12			/* Close enough to zero   */
 #define MAT3_PI 	3.141592653589793	/* Pi			  */
@@ -147,9 +148,11 @@ int		MAT3mult_hvec (MAT3hvec result_vec, MAT3hvec vec, MAT3mat mat, int normaliz
 void		MAT3cross_product(MAT3vec result,MAT3vec,MAT3vec);
 void		MAT3perp_vec(MAT3vec result_vec, MAT3vec vec, int is_unit);
 
+
 #ifdef __cplusplus
 }
 #endif
 
+
 #endif /* MAT3_HAS_BEEN_INCLUDED */