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add more safety

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Alug 2024-03-29 23:48:33 +01:00
parent 4df9749570
commit e3c42b3ba2
1 changed files with 7 additions and 3 deletions
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10
src/hardware/hw_cache.c
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@ -481,7 +481,7 @@ static void FreeMipmapColormap(INT32 patchnum, void *patch)
{ {
GLPatch_t* const pat = patch; GLPatch_t* const pat = patch;
(void)patchnum; //unused (void)patchnum; //unused
// The patch must be valid, obviously // The patch must be valid, obviously
if (!pat) if (!pat)
return; return;
@ -498,19 +498,23 @@ static void FreeMipmapColormap(INT32 patchnum, void *patch)
if (!pat->mipmap) if (!pat->mipmap)
break; break;
// No colormap mipmap either. // No colormap mipmaps either.
if (!pat->mipmap->nextcolormap) if (!pat->mipmap->nextcolormap)
break; break;
// Set the first colormap to the one that comes after it. // Set the first colormap to the one that comes after it.
next = pat->mipmap->nextcolormap; next = pat->mipmap->nextcolormap;
if (!next)
break;
pat->mipmap->nextcolormap = next->nextcolormap; pat->mipmap->nextcolormap = next->nextcolormap;
// Free image data from memory. // Free image data from memory.
if (next->grInfo.data) if (next->grInfo.data)
Z_Free(next->grInfo.data); Z_Free(next->grInfo.data);
next->grInfo.data = NULL;
// Free the old colormap from memory. // Free the old colormap mipmap from memory.
free(next); free(next);
} }
} }