bitsetv: fix module dependencies

[Bruno Haible]

A module shouldn't rely on internals of another module.
bitsetv.c invokes xalloc_die(), therefore it should #include "xalloc.h",
regardless whether bitset.h already - indirectly through bitset/base.h -
includes xalloc.h.


2019-01-04  Bruno Haible  <address@hidden>

        bitsetv: Fix module dependencies.
        * lib/bitsetv.c: Include xalloc.h.
        * modules/bitsetv (Depends-on): Add 'xalloc'.

diff --git a/lib/bitsetv.c b/lib/bitsetv.c
index b509982..e3cc584 100644
--- a/lib/bitsetv.c
+++ b/lib/bitsetv.c
@@ -22,6 +22,8 @@
 
 #include <stdlib.h>
 
+#include "xalloc.h"
+
 
 /* Create a vector of N_VECS bitsets, each of N_BITS, and of
    type TYPE.  */
diff --git a/modules/bitsetv b/modules/bitsetv
index 30be286..4b6c1a8 100644
--- a/modules/bitsetv
+++ b/modules/bitsetv
@@ -7,6 +7,7 @@ lib/bitsetv.h
 
 Depends-on:
 bitset
+xalloc
 
 Makefile.am:
 lib_SOURCES += bitsetv.c