[PATCH blktests] Fix build failure for discontiguous-io on 32-bit platforms

[Theodore Ts'o]

Signed-off-by: Theodore Ts'o <ty...@mit.edu>
---
 src/discontiguous-io.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/discontiguous-io.cpp b/src/discontiguous-io.cpp
index 5e0ee0f..a59c18d 100644
--- a/src/discontiguous-io.cpp
+++ b/src/discontiguous-io.cpp
@@ -291,7 +291,7 @@ int main(int argc, char **argv)
                        unsigned char *p = &*buf.begin();
                        for (int i = 0; i < len / 4; i++)
                                iov.append(p + 4 + i * 8,
-                                          std::min(4ul, len - i * 4));
+                                          std::min(4ul, (unsigned long) len - 
i * 4));
                } else {
                        iov.append(&*buf.begin(), buf.size());
                }
-- 
2.18.0.rc0