reg: Define MAX_SUBKEY_LEN in reg.h.

programs/reg/export.c

@@ -236,8 +236,6 @@ static void export_key_name(HANDLE hFile, WCHAR *name)
     heap_free(buf);
 }
 
-#define MAX_SUBKEY_LEN   257
-
 static int export_registry_data(HANDLE hFile, HKEY key, WCHAR *path)
 {
     LONG rc;

programs/reg/reg.c

@@ -651,8 +651,6 @@ WCHAR *build_subkey_path(WCHAR *path, DWORD path_len, WCHAR *subkey_name, DWORD
 
 static unsigned int num_values_found = 0;
 
-#define MAX_SUBKEY_LEN   257
-
 static int query_value(HKEY key, WCHAR *value_name, WCHAR *path, BOOL recurse)
 {
     LONG rc;

programs/reg/reg.h

@@ -22,6 +22,7 @@
 #include "resource.h"
 
 #define ARRAY_SIZE(A) (sizeof(A)/sizeof(*A))
+#define MAX_SUBKEY_LEN   257
 
 /* reg.c */
 void *heap_xalloc(size_t size);