[PATCH] util: fix thinko in runIO

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When aligning you need to clear the bits in the mask and leave the
others aside.  Likely this code has never run, and will never run.

Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
 src/util/iohelper.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/util/iohelper.c b/src/util/iohelper.c
index 9e7bbde..93154f8 100644
--- a/src/util/iohelper.c
+++ b/src/util/iohelper.c
@@ -98,7 +98,7 @@ runIO(const char *path, int fd, int oflags, unsigned long long length)
         goto cleanup;
     }
     base = buf;
-    buf = (char *) (((intptr_t) base + alignMask) & alignMask);
+    buf = (char *) (((intptr_t) base + alignMask) & ~alignMask);
 #endif
 
     switch (oflags & O_ACCMODE) {
-- 
1.7.7.1

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