Patch taken from the Sage packaging system.

From 4a5e1c8c3c11efdb1cbb4239825a6bf4bf1c52f8 Mon Sep 17 00:00:00 2001
From: Anders Skovsted Buch <asbuch@math.rutgers.edu>
Date: Sun, 29 Nov 2015 16:25:56 -0500
Subject: [PATCH] Patch by Jeroen Demeyer to change include <vector.h> to
 "vector.h", plus similar cases.

---
 src/lrcalc.c   | 2 +-
 src/maple.c    | 4 ++--
 src/schublib.h | 2 +-
 src/symfcn.c   | 6 +++---
 src/symfcn.h   | 4 ++--
 5 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/src/lrcalc.c b/src/lrcalc.c
index aff3f75..60df49e 100644
--- a/src/lrcalc.c
+++ b/src/lrcalc.c
@@ -8,7 +8,7 @@
 #include <stdlib.h>
 extern char *optarg;
 
-#include <vectarg.h>
+#include "vectarg.h"
 
 #include "symfcn.h"
 #include "maple.h"
diff --git a/src/maple.c b/src/maple.c
index fdc0768..a5f4d14 100644
--- a/src/maple.c
+++ b/src/maple.c
@@ -4,8 +4,8 @@
  */
 
 #include <stdio.h>
-#include <vector.h>
-#include <hashtab.h>
+#include "vector.h"
+#include "hashtab.h"
 #include "maple.h"
 
 
diff --git a/src/schublib.h b/src/schublib.h
index a8e8511..864850c 100644
--- a/src/schublib.h
+++ b/src/schublib.h
@@ -1,7 +1,7 @@
 #ifndef _SCHUBLIB_H
 #define _SCHUBLIB_H
 
-#include <hashtab.h>
+#include "hashtab.h"
 
 hashtab *trans(vector *w, int vars, hashtab *res);
 hashtab *monk(int i, hashtab *slc, int rank);
diff --git a/src/symfcn.c b/src/symfcn.c
index 4ffbe4b..fd5df5d 100644
--- a/src/symfcn.c
+++ b/src/symfcn.c
@@ -5,9 +5,9 @@
 
 #include <stdio.h>
 
-#include <alloc.h>
-#include <vector.h>
-#include <hashtab.h>
+#include "alloc.h"
+#include "vector.h"
+#include "hashtab.h"
 
 #include "symfcn.h"
 
diff --git a/src/symfcn.h b/src/symfcn.h
index b8543b1..29bb00d 100644
--- a/src/symfcn.h
+++ b/src/symfcn.h
@@ -1,8 +1,8 @@
 #ifndef _SYMFCN_H
 #define _SYMFCN_H
 
-#include <hashtab.h>
-#include <vector.h>
+#include "hashtab.h"
+#include "vector.h"
 
 int part_itr_sz(vector *part);
 int part_itr_sub(vector *part, vector *outer);
-- 
2.1.1.1.g1fb337f