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https://bugs.gentoo.org/883707
diff --git a/imgJPEG.c b/imgJPEG.c
index cb62e40..4ca80b5 100644
--- a/imgJPEG.c
+++ b/imgJPEG.c
@@ -118,7 +118,7 @@ static int ChnWriteJPEG _ANSI_ARGS_((Tcl_Interp *interp,
char *fileName, Tcl_Obj *format,
Tk_PhotoImageBlock *blockPtr));
static int StringWriteJPEG _ANSI_ARGS_((Tcl_Interp *interp,
- Tcl_DString *dataPtr, Tcl_Obj *format,
+ Tcl_Obj *format,
Tk_PhotoImageBlock *blockPtr));
Tk_PhotoImageFormat imgFmtJPEG = {
@@ -970,7 +970,7 @@ CommonReadJPEG(interp, cinfo, format, imageHandle, destX, destY,
int srcX, srcY; /* Coordinates of top-left pixel to be used
* in image being read. */
{
- static char *jpegReadOptions[] = {"-fast", "-grayscale", NULL};
+ static const char *jpegReadOptions[] = {"-fast", "-grayscale", NULL};
int fileWidth, fileHeight, stopY, curY, outY, outWidth, outHeight;
myblock bl;
#define block bl.ck
@@ -1262,7 +1262,7 @@ CommonWriteJPEG(interp, cinfo, format, blockPtr)
Tcl_Obj *format;
Tk_PhotoImageBlock *blockPtr;
{
- static char *jpegWriteOptions[] = {"-grayscale", "-optimize",
+ static const char *jpegWriteOptions[] = {"-grayscale", "-optimize",
"-progressive", "-quality", "-smooth", NULL};
JSAMPROW row_pointer[1]; /* pointer to original data scanlines */
JSAMPARRAY buffer; /* Intermediate row buffer */
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