config_file: add missing include for `git_config_backend` The config_file.h header provides some inline declarations accessing the `git_config_backend`, but misses its declaration. Add the missing include for "git2/sys/config.h" to add it.
diff --git a/src/config_file.h b/src/config_file.h
index 1c52892..654e6ca 100644
--- a/src/config_file.h
+++ b/src/config_file.h
@@ -7,6 +7,7 @@
#ifndef INCLUDE_config_file_h__
#define INCLUDE_config_file_h__
+#include "git2/sys/config.h"
#include "git2/config.h"
GIT_INLINE(int) git_config_file_open(git_config_backend *cfg, unsigned int level)