Fixed TMP_ALLOC, was missing parentheses.

ChangeLog

+2013-02-20  Niels Möller  <nisse@lysator.liu.se>
+
+	* nettle-internal.h (TMP_ALLOC): Added missing parentheses.
+
 2013-02-18  Niels Möller  <nisse@lysator.liu.se>
 
 	* testsuite/ecdsa-verify-test.c: New testcase.

nettle-internal.h

@@ -36,11 +36,11 @@
 
 #if HAVE_ALLOCA
 # define TMP_DECL(name, type, max) type *name
-# define TMP_ALLOC(name, size) (name = alloca(sizeof (*name) * size))
+# define TMP_ALLOC(name, size) (name = alloca(sizeof (*name) * (size)))
 #else /* !HAVE_ALLOCA */
 # define TMP_DECL(name, type, max) type name[max]
 # define TMP_ALLOC(name, size) \
-do { if (size > (sizeof(name) / sizeof(name[0]))) abort(); } while (0)
+  do { if ((size) > (sizeof(name) / sizeof(name[0]))) abort(); } while (0)
 #endif 
 
 /* Arbitrary limits which apply to systems that don't have alloca */