Fix build errors

Author: attipaci

src/frames.c

@@ -40,15 +40,9 @@ static int cmp_sys(enum novas_reference_system a, enum novas_reference_system b)
 }
 
 static int matrix_transform(const double *in, const novas_matrix *matrix, double *out) {
-  static const char *fn = "novas_matrix_transform";
   double orig[3];
   int i;
 
-  if(!in || !out)
-    return novas_error(-1, EINVAL, fn, "NULL coordinate: in=%p, out=%p", in, out);
-  if(!matrix)
-    return novas_error(-1, EINVAL, fn, "NULL matrix pointer");
-
   memcpy(orig, in, sizeof(orig));
 
   for(i = 3; --i >= 0;)
@@ -60,15 +54,9 @@ static int matrix_transform(const double *in, const novas_matrix *matrix, double
 
 static int matrix_inv_rotate(const double *in, const novas_matrix *matrix, double *out) {
   // IMPORTANT! use only with unitary matrices.
-  static const char *fn = "novas_matrix_transform";
   double orig[3];
   int i;
 
-  if(!in || !out)
-    return novas_error(-1, EINVAL, fn, "NULL coordinate: in=%p, out=%p", in, out);
-  if(!matrix)
-    return novas_error(-1, EINVAL, fn, "NULL matrix pointer");
-
   memcpy(orig, in, sizeof(orig));
 
   for(i = 3; --i >= 0;)
@@ -286,7 +274,6 @@ int novas_make_frame(enum novas_accuracy accuracy, const observer *obs, const no
   double mobl, tobl, ee, dpsi, deps;
   long ijd_ut1;
   double fjd_ut1;
-  int err;
 
   if(accuracy < 0 || accuracy > NOVAS_REDUCED_ACCURACY)
     return novas_error(-1, EINVAL, fn, "invalid accuracy: %d", accuracy);

src/novas.c

@@ -3433,7 +3433,7 @@ int e_tilt(double jd_tdb, enum novas_accuracy accuracy, double *mobl, double *to
  * @param dx          [mas] Earth orientation: GCRS pole offset dx, e.g. as published by IERS Bulletin A.
  * @param dy          [mas] Earth orientation: GCRS pole offset dy, e.g. as published by IERS Bulletin A.
  * @param[out] dpsi   [arcsec] Calculated TOD orientation dψ.
- * @param[out] deps   [arcsec] Calculated TOD orientation d&eps;.
+ * @param[out] deps   [arcsec] Calculated TOD orientation dε.
  * @return            0
  *
  * @sa cel_pole()