if(0)?

Hi,

I'm trying to track down a 'Nesting too deep' error on a file that
works fine for regular LaTeX. I notice that the PushSource function in
parser.c (line 151) contains two if(0){ ... } constructs. Does this
serve any purpose? This code will never be executed under any
circumstances, so could it be removed?

A quick grep reveals the following additional if(0) constructs:

grep -nH -e 'if *( *0 *)' ./*
./definitions.c:427:		if (0) {
./definitions.c:434:			if (0) {
./definitions.c:444:			if (0) {
./definitions.c:453:	if (0) {
./graphics.c:1244:    if (0) {
./graphics.c:1253:    if (0) {
./parser.c:165:    if (0) {
./parser.c:227:    if (0) {
./parser.c:277:    if (0) {
./parser.c:330:    if (0) {
./parser.c:491:    if (0) {
./parser.c:560:	if (0) {
./parser.c:1064:        if (0) {
./preparse.c:86:	if (0) {
./preparse.c:130:	if (0) {
./preparse.c:137:	if (0) {
./preparse.c:302:            if (0) show_buffer("percent");

Thanks,

Tyler

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