Fix attrib-5.c test-case.

2017-10-16  Martin Liska  <mliska@suse.cz>

	* c-c++-common/ubsan/attrib-5.c (float_cast2): Fix warning scan
	so that it will work for both C and C++ FEs.

From-SVN: r253795

gcc/testsuite/ChangeLog

+2017-10-16  Martin Liska  <mliska@suse.cz>
+
+	* c-c++-common/ubsan/attrib-5.c (float_cast2): Fix warning scan
+	so that it will work for both C and C++ FEs.
+
 2017-10-16  Fritz Reese <fritzoreese@gmail.com>
 
 	PR fortran/82511

gcc/testsuite/c-c++-common/ubsan/attrib-5.c

@@ -3,8 +3,7 @@
 
 __attribute__((no_sanitize("foobar")))
 static void
-float_cast2 (void)
-{ /* { dg-warning "attribute directive ignored" } */
+float_cast2 (void) { /* { dg-warning "attribute directive ignored" } */
   volatile double d = 300;
   volatile signed char c;
   c = d;