Undef ASSERT before defining it to ensure that no previous definition

has sneaked in through included files.

Signed-off-by: Ouss4 <abdelatif.guettouche@gmail.com>

library/chacha20.c

@@ -516,6 +516,9 @@ static const size_t test_lengths[2] =
     375U
 };
 
+/* Make sure no other definition is already present. */
+#undef ASSERT
+
 #define ASSERT( cond, args )            \
     do                                  \
     {                                   \

library/chachapoly.c

@@ -472,6 +472,9 @@ static const unsigned char test_mac[1][16] =
     }
 };
 
+/* Make sure no other definition is already present. */
+#undef ASSERT
+
 #define ASSERT( cond, args )            \
     do                                  \
     {                                   \

library/poly1305.c

@@ -509,6 +509,9 @@ static const unsigned char test_mac[2][16] =
     }
 };
 
+/* Make sure no other definition is already present. */
+#undef ASSERT
+
 #define ASSERT( cond, args )            \
     do                                  \
     {                                   \

undef_assert_before_defining_it.txt

@@ -0,0 +1,3 @@
+Changes
+   * Undefine the ASSERT macro before defining it locally, in case it is defined
+     in a platform header. Contributed by Abdelatif Guettouche in #3557.