Merge pull request libgit2#6032 from lhchavez/git-extern-git-remote-name-is-valid

Author: Edward Thomson

include/git2/remote.h

@@ -971,7 +971,7 @@ GIT_EXTERN(int) git_remote_rename(
  * @param remote_name name to be checked.
  * @return 0 on success or an error code
  */
-int git_remote_name_is_valid(int *valid, const char *remote_name);
+GIT_EXTERN(int) git_remote_name_is_valid(int *valid, const char *remote_name);
 
 /**
 * Delete an existing persisted remote.