configure: Don't build wow32.dll when 16-bit support is disabled.
diff --git a/configure.ac b/configure.ac
index 0c1c0bf..d489f00 100644
--- a/configure.ac
+++ b/configure.ac
@@ -178,6 +178,7 @@
     enable_w32skrnl=${enable_w32skrnl:-no}
     enable_winedos=${enable_winedos:-no}
     enable_winevdm=${enable_winevdm:-no}
+    enable_wow32=${enable_wow32:-no}
 fi
 
 dnl Some special cases for the wow64 build