suppressed some compilation warnings

src/spasm_lu.c

@@ -3,7 +3,7 @@
 #include "spasm.h"
 
 spasm_lu * spasm_PLUQ(const spasm *A) {
-  int n, m, i, j, r, px, k;
+  int m, i, j, r, px, k;
   int *Up, *Uj, *qinv;
   spasm *U, *L, *LL;
   spasm_lu *N;
@@ -15,7 +15,6 @@ spasm_lu * spasm_PLUQ(const spasm *A) {
   Up = U->p;
   Uj = U->j;
   qinv = N->qinv;
-  n = A->n;
   m = A->m;
 
   k = 1;

src/spasm_solutions.c

@@ -11,7 +11,7 @@ int spasm_PLUQ_solve(const spasm *A, const spasm_GFp *b, spasm_GFp *x) {
   spasm_GFp *y;
     spasm_lu *PLUQ;
     spasm *L, *U;
-    int i, n, m, r, ok ;
+    int n, m, r, ok ;
 
     /* check inputs */
     assert(A != NULL);

test/pluq.c

@@ -6,9 +6,8 @@ int main(int argc, char **argv) {
   spasm_triplet *T;
   spasm *A, *U, *L;
   spasm_lu *PLUQ;
-  spasm_GFp *x, *y, *u, *v, *w, *z, *Lx;
+  spasm_GFp *x, *y, *u, *v, *w, *z;
   int n, m, r, test, i, j;
-  int *Up, *Uj, *Lp, *Lj;
 
   assert(argc > 1);
   test = atoi(argv[1]);
@@ -22,12 +21,7 @@ int main(int argc, char **argv) {
 
   PLUQ = spasm_PLUQ(A);
   U = PLUQ->U;
-  Up = U->p;
-  Uj = U->j;
   L = PLUQ->L;
-  Lp = L->p;
-  Lj = L->j;
-  Lx = L->x;
   r = U->n;