(mi_init): Avoid name-space pollution: make mi_init() an arch-object.

(Logical change 1.41)
diff --git a/include/internal.h b/include/internal.h
index 5008970..c23bc22 100644
--- a/include/internal.h
+++ b/include/internal.h
@@ -202,6 +202,8 @@
   return ret;
 }
 
+#define mi_init		UNWI_ARCH_OBJ(mi_init)
+
 extern void mi_init (void);	/* machine-independent initializations */
 
 #include <tdep.h>