configure: Fix ambiguous "$(("

diff --git a/configure b/configure
index 362aeb243f28cd9093faa939bde88981b8b56e0d..3b8d81456cbcdcae0efeb40d61ab3923c7e68530 100755 (executable)
--- a/configure
+++ b/configure
@@ -919,7 +919,7 @@ fi
 
 if [ $asm = auto -a \( $ARCH = X86 -o $ARCH = X86_64 \) ] ; then
     if ! as_check "vmovdqa32 [eax]{k1}{z}, zmm0" ; then
-        VER="$(($AS --version || echo no assembler) 2>/dev/null | head -n 1)"
+        VER="$( ($AS --version || echo no assembler) 2>/dev/null | head -n 1 )"
         echo "Found $VER"
         echo "Minimum version is nasm-2.13"
         echo "If you really want to compile without asm, configure with --disable-asm."