errors: Fix format of some error messages

src/odb.c

@@ -445,7 +445,7 @@ int git_odb_get_backend(git_odb_backend **out, git_odb *odb, size_t pos)
 		return 0;
 	}
 
-	giterr_set(GITERR_ODB, "No ODB backend loaded at index " PRIuZ, pos);
+	giterr_set(GITERR_ODB, "No ODB backend loaded at index %" PRIuZ, pos);
 	return GIT_ENOTFOUND;
 }
 

src/reflog.c

@@ -484,7 +484,7 @@ int git_reflog_drop(
 	entry = (git_reflog_entry *)git_reflog_entry_byindex(reflog, idx);
 
 	if (entry == NULL) {
-		giterr_set(GITERR_REFERENCE, "No reflog entry at index "PRIuZ, idx);
+		giterr_set(GITERR_REFERENCE, "No reflog entry at index %"PRIuZ, idx);
 		return GIT_ENOTFOUND;
 	}
 

src/revparse.c

@@ -217,7 +217,7 @@ static int retrieve_oid_from_reflog(git_oid *oid, git_reference *ref, size_t ide
 		if (numentries < identifier + 1) {
 			giterr_set(
 				GITERR_REFERENCE,
-				"Reflog for '%s' has only "PRIuZ" entries, asked for "PRIuZ,
+				"Reflog for '%s' has only %"PRIuZ" entries, asked for %"PRIuZ,
 				git_reference_name(ref), numentries, identifier);
 
 			error = GIT_ENOTFOUND;