initialize pr94314-3.C counter

The int counter in the main loop was uninitialized, so we might end up
looping a very large number of times before completing successfully.
I suspect that was unintended, so I'm adding a zero initializer.


for  gcc/testsuite/ChangeLog

	* g++.dg/pr94314-3.C: Zero-initialize main loop counter.

gcc/testsuite/g++.dg/pr94314-3.C

@@ -38,7 +38,7 @@ volatile int c = 1;
 int
 main ()
 {
-  for (int i; i < c; i++)
+  for (int i = 0; i < c; i++)
     {
       idx = 0;
       delete new B;