configure: Fix comment (copy+paste bug)

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
diff --git a/configure b/configure
index fe18ed2..148d5aa 100755
--- a/configure
+++ b/configure
@@ -2705,7 +2705,7 @@
   byteswap_h=yes
 fi
 
-# Search for bswap_32 function
+# Search for bswap32 function
 bswap_h=no
 cat > $TMPC << EOF
 #include <sys/endian.h>