Avoid signed/unsigned problem.
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@ -203,14 +203,14 @@ void
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csrmatrix_write(const struct CSRMatrix *A, const char *fn)
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/* ---------------------------------------------------------------------- */
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{
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int i, j;
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FILE *fp;
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size_t i, j;
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FILE *fp;
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fp = fopen(fn, "wt");
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if (fp != NULL) {
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for (i = j = 0; i < A->m; i++) {
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for (; j < A->ia[i + 1]; j++) {
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for (; j < (size_t) (A->ia[i + 1]); j++) {
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fprintf(fp, "%lu %lu %26.18e\n",
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(unsigned long) (i + 1),
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(unsigned long) (A->ja[j] + 1),
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