| # | Line 151 | Line 151 | BMPopenReader(int (*cget)(void *), int (*seek)(uint32, | |
|---|---|---|
| 151 | ||
| 152 | if (cget == NULL) | |
| 153 | return NULL; | |
| 154 | + | if (cget == &stdio_getc && c_data == NULL) |
| 155 | + | return NULL; /* stdio error condition */ |
| 156 | magic[0] = (*cget)(c_data); | |
| 157 | if (magic[0] != 'B') | |
| 158 | return NULL; | |
| # | Line 628 | Line 630 | BMPopenWriter(void (*cput)(int, void *), int (*seek)(u | |
| 630 | /* check arguments */ | |
| 631 | if (cput == NULL) | |
| 632 | return NULL; | |
| 633 | + | if (cput == &stdio_putc && c_data == NULL) |
| 634 | + | return NULL; /* stdio error condition */ |
| 635 | if (!BMPheaderOK(hdr)) | |
| 636 | return NULL; | |
| 637 | if ((hdr->bpp == 16) | (hdr->compr == BI_RLE4)) | |
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