re PR middle-end/26632 (spurious warning: value computed is not used)

	PR middle-end/26632
	* gcc.dg/pr26632.c: New.

From-SVN: r116580

gcc/testsuite/gcc.dg/pr26632.c

+/* PR middle-end/26632
+   We used to issue a warning for an implicit cast whose result is not
+   used.  */
+/* { dg-do compile } */
+/* { dg-options "-Wall" } */
+
+int g (void);
+long h (void);
+
+void
+f (void)
+{
+  0 ? h () : g (); /* { dg-bogus "value computed is not used" } */
+}