PATCH: fix open_memstream's regression test

[Doug Hogan]

Ran into this while running the regression suite for another patch.

The regression test for open_memstream causes a SIGBUS because it closes
the stream too early.

Replaced fclose with fflush since they both update pbuf and psize.
Added a similar check for fclose at the end.

Index: regress/lib/libc/open_memstream/open_memstreamtest.c
===================================================================
RCS file: /cvs/src/regress/lib/libc/open_memstream/open_memstreamtest.c,v
retrieving revision 1.3
diff -u -p -d -r1.3 open_memstreamtest.c
--- regress/lib/libc/open_memstream/open_memstreamtest.c        28 Mar 2013 
09:35:58 -0000      1.3
+++ regress/lib/libc/open_memstream/open_memstreamtest.c        18 Jul 2014 
02:17:58 -0000
@@ -127,8 +127,8 @@ main(void)
                failures++;
        }
 
-       if (fclose(fp) == EOF) {
-               warnx("fclose failed. (17)");
+       if (fflush(fp) == EOF) {
+               warnx("fflush failed. (17)");
                failures++;
        }
 
@@ -156,6 +156,22 @@ main(void)
 
        if (ftell(fp) != 7) {
                warnx("failed seeking backward. (22)");
+               failures++;
+       }
+
+       if (fseek(fp, 5, SEEK_CUR) != 0) {
+               warnx("failed to fseek. (23)");
+               failures++;
+       }
+
+       if (fclose(fp) == EOF) {
+               warnx("fclose failed. (24)");
+               failures++;
+       }
+
+       if (size != 12) {
+               warnx("failed, size %zu should be %u.  (25)",
+                   size, 12);
                failures++;
        }