Restore compilation wit flintlib 3.1

Author: tornaria

src/sage/libs/flint/flint_wrap.h

@@ -30,6 +30,10 @@
 #pragma push_macro("I")
 #define I Iv
 
+/* flint 3.2 will rename flint_rand_s to flint_rand_struct
+ * the following line can be removed when flint 3.1 is gone */
+#define flint_rand_s flint_rand_struct
+
 #include <flint/flint.h>
 
 /* If flint was already previously included via another header (e.g.

src/sage_setup/autogen/flint/templates/flint_wrap.h.template

@@ -30,6 +30,10 @@
 #pragma push_macro("I")
 #define I Iv
 
+/* flint 3.2 will rename flint_rand_s to flint_rand_struct
+ * the following line can be removed when flint 3.1 is gone */
+#define flint_rand_s flint_rand_struct
+
 #include <flint/flint.h>
 
 /* If flint was already previously included via another header (e.g.

src/sage_setup/autogen/flint/templates/types.pxd.template

@@ -269,9 +269,9 @@ cdef extern from "flint_wrap.h":
 
 
     # flint/flint.h
-    ctypedef struct flint_rand_s:
+    ctypedef struct flint_rand_struct:
         pass
-    ctypedef flint_rand_s flint_rand_t[1]
+    ctypedef flint_rand_struct flint_rand_t[1]
     ctypedef enum flint_err_t:
         # flint_autogen.py does not support parsing .. enum:: yet
         FLINT_ERROR