qemu: chardev: avoid impossible overflow

In the rare case where int and long long are not the same size,
the multiplication of an int variable and an int constant might
overflow. Cast the constant to long long to avoid this.

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Fixes: baa4edfb79d5ee861a08b5ec11416c5c156d8cd2
Reviewed-by: Peter Krempa <pkrempa@redhat.com>

src/qemu/qemu_chardev.c

@@ -247,7 +247,7 @@ qemuChardevGetBackendProps(const virDomainChrSourceDef *chr,
 
         if (reconnect != -1 &&
             virQEMUCapsGet(qemuCaps, QEMU_CAPS_CHARDEV_RECONNECT_MILISECONDS)) {
-            reconnect_ms = reconnect * 1000;
+            reconnect_ms = reconnect * (long long) 1000;
             reconnect = -1;
         }