Add casts for C++ compatibility.

Author: Torbjorn Granlund

gen-psqr.c

@@ -135,8 +135,8 @@ int
 f_cmp_divisor (const void *parg, const void *qarg)
 {
   const struct factor_t *p, *q;
-  p = parg;
-  q = qarg;
+  p = (const struct factor_t *) parg;
+  q = (const struct factor_t *) qarg;
   if (p->divisor > q->divisor)
     return 1;
   else if (p->divisor < q->divisor)
@@ -149,8 +149,8 @@ int
 f_cmp_fraction (const void *parg, const void *qarg)
 {
   const struct factor_t *p, *q;
-  p = parg;
-  q = qarg;
+  p = (const struct factor_t *) parg;
+  q = (const struct factor_t *) qarg;
   if (p->fraction > q->fraction)
     return 1;
   else if (p->fraction < q->fraction)
@@ -212,7 +212,7 @@ generate_sq_res_0x100 (int limb_bits)
   int  i, res;
 
   nsq_res_0x100 = (0x100 + limb_bits - 1) / limb_bits;
-  sq_res_0x100 = xmalloc (nsq_res_0x100 * sizeof (*sq_res_0x100));
+  sq_res_0x100 = (mpz_t *) xmalloc (nsq_res_0x100 * sizeof (*sq_res_0x100));
 
   for (i = 0; i < nsq_res_0x100; i++)
     mpz_init_set_ui (sq_res_0x100[i], 0L);
@@ -243,8 +243,8 @@ generate_mod (int limb_bits, int nail_bits)
   /* no more than limb_bits many factors in a one limb modulus (and of
      course in reality nothing like that many) */
   factor_alloc = limb_bits;
-  factor = xmalloc (factor_alloc * sizeof (*factor));
-  rawfactor = xmalloc (factor_alloc * sizeof (*rawfactor));
+  factor = (struct factor_t *) xmalloc (factor_alloc * sizeof (*factor));
+  rawfactor = (struct rawfactor_t *) xmalloc (factor_alloc * sizeof (*rawfactor));
 
   if (numb_bits % 4 != 0)
     {