Fix a bug in the old-gcc version of ENABLE_GCC_WARNING

Fixes bug 19901; bugfix on 0.2.9.1-alpha.

changes/bug19901

@@ -0,0 +1,5 @@
+  o Minor bugfixes (compilation):
+v   - Fix a compilation warning on GCC versions before 4.6.  Our
+      ENABLE_GCC_WARNING macro used the word "warning" as an
+      argument, when it is also required as an argument to the
+      compiler pragma. Fixes bug 19901; bugfix on 0.2.9.1-alpha.

src/common/compat.h

@@ -104,17 +104,17 @@
 #  endif
 #  if defined(__clang__) || GCC_VERSION >= 406
 /* we have push/pop support */
-#    define DISABLE_GCC_WARNING(warning) \
+#    define DISABLE_GCC_WARNING(warningopt) \
           PRAGMA_DIAGNOSTIC_(push) \
-          PRAGMA_DIAGNOSTIC_(ignored PRAGMA_JOIN_STRINGIFY_(-W,warning))
-#    define ENABLE_GCC_WARNING(warning) \
+          PRAGMA_DIAGNOSTIC_(ignored PRAGMA_JOIN_STRINGIFY_(-W,warningopt))
+#    define ENABLE_GCC_WARNING(warningopt) \
           PRAGMA_DIAGNOSTIC_(pop)
 #  else
 /* older version of gcc: no push/pop support. */
-#    define DISABLE_GCC_WARNING(warning) \
-         PRAGMA_DIAGNOSTIC_(ignored PRAGMA_JOIN_STRINGIFY_(-W,warning))
-#    define ENABLE_GCC_WARNING(warning) \
-         PRAGMA_DIAGNOSTIC_(warning PRAGMA_JOIN_STRINGIFY_(-W,warning))
+#    define DISABLE_GCC_WARNING(warningopt) \
+         PRAGMA_DIAGNOSTIC_(ignored PRAGMA_JOIN_STRINGIFY_(-W,warningopt))
+#    define ENABLE_GCC_WARNING(warningopt) \
+         PRAGMA_DIAGNOSTIC_(warning PRAGMA_JOIN_STRINGIFY_(-W,warningopt))
 #  endif
 #else /* ifdef __GNUC__ */
 /* not gcc at all */