[PR target/85056] Address -Wmaybe-uninitialized diagnostic

	gcc/testsuite/
	* gcc.target/nvptx/pr85056.c (main): Initialize "sum".

From-SVN: r259288

gcc/testsuite/ChangeLog

+2018-04-10  Thomas Schwinge  <thomas@codesourcery.com>
+
+	PR target/85056
+	* gcc.target/nvptx/pr85056.c (main): Initialize "sum".
+
 2018-04-10  Jakub Jelinek  <jakub@redhat.com>
 
 	PR rtl-optimization/85300

gcc/testsuite/gcc.target/nvptx/pr85056.c

@@ -10,6 +10,7 @@ main ()
 {
   int i, sum;
 
+  sum = 0;
   for (i = 0; i < 10; i++)
     sum += a[i];