Merge pull request #1915 from zcbenz/common-h-before-config-h

The "common.h" should be included before "config.h".

src/attr.c

+#include "common.h"
 #include "repository.h"
 #include "fileops.h"
 #include "config.h"

src/ignore.c

 #include "git2/ignore.h"
+#include "common.h"
 #include "ignore.h"
 #include "attr.h"
 #include "path.h"

src/remote.c

@@ -10,6 +10,7 @@
 #include "git2/oid.h"
 #include "git2/net.h"
 
+#include "common.h"
 #include "config.h"
 #include "repository.h"
 #include "remote.h"