(INTERVAL_WRITABLE_P): Fix backwards tests.

diff --git a/src/intervals.h b/src/intervals.h
index c724f31ede34b8dfade3eaa6f763961c2d3df369..7a6c91064fdfe4b3ec5862b98ddaa83eaf94a44b 100644 (file)
--- a/src/intervals.h
+++ b/src/intervals.h
@@ -140,12 +140,13 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
   (! NULL_INTERVAL_P (i) && NILP (textget ((i)->plist, Qinvisible)))
 
 /* Is this interval writable?  Replace later with cache access */
-#define INTERVAL_WRITABLE_P(i) \
-  (! NULL_INTERVAL_P (i) && NILP (textget ((i)->plist, Qread_only))    \
-   && (NILP (Vinhibit_read_only)                                       \
-       || (CONSP (Vinhibit_read_only)                                  \
-          && !NILP (Fmemq (textget ((i)->plist, Qread_only),           \
-                           Vinhibit_read_only)))))
+#define INTERVAL_WRITABLE_P(i)                                 \
+  (! NULL_INTERVAL_P (i)                                       \
+   && (NILP (textget ((i)->plist, Qread_only))                 \
+       || ((CONSP (Vinhibit_read_only)                         \
+           ? !NILP (Fmemq (textget ((i)->plist, Qread_only),   \
+                           Vinhibit_read_only))                \
+           : !NILP (Vinhibit_read_only)))))                    \
 
 /* Macros to tell whether insertions before or after this interval
    should stick to it. */