Fix qemu-img configure.ac check

By accident, commit a002ed79 introduced the qemu-img checks in the
htools block. I found this also by mistake while investigating
another issue :)

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

configure.ac

@@ -361,8 +361,6 @@ then
   AC_MSG_ERROR([socat not found])
 fi
 
-if test "$enable_htools" != "no"; then
-
 # Check for qemu-img
 AC_ARG_VAR(QEMUIMG_PATH, [qemu-img path])
 AC_PATH_PROG(QEMUIMG_PATH, [qemu-img], [])
@@ -371,6 +369,8 @@ then
   AC_MSG_WARN([qemu-img not found, using ovfconverter will not be possible])
 fi
 
+if test "$enable_htools" != "no"; then
+
 # Check for ghc
 AC_ARG_VAR(GHC, [ghc path])
 AC_PATH_PROG(GHC, [ghc], [])