qemu: Fix qemuBuildCommandLine prototype

Commit id '0da965c5' removed the 11th parameter, but neglected to
remove the ATTRIBUTE_NONNULL for it and adjust the 17th and 18th.

src/qemu/qemu_command.h

@@ -63,8 +63,7 @@ virCommandPtr qemuBuildCommandLine(virConnectPtr conn,
                                    int **nicindexes,
                                    const char *domainLibDir,
                                    const char *domainChannelTargetDir)
-    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(11)
-    ATTRIBUTE_NONNULL(17) ATTRIBUTE_NONNULL(18);
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(16) ATTRIBUTE_NONNULL(17);
 
 /* Generate '-device' string for chardev device */
 int