[xml] xsltproc does not set error code when parsinf faulty xsl

[Stefan Kost <kost imn htwk-leipzig de>]

hi Daniel,

is it intensional that xsltpro not returns an error incase of invalid xslt files.
I've inserted an mistyped elements (xsl:ooutput) and run xsltpro as below:

> xsltproc typo.xsl && echo $?
Parsing stylesheet typo.xsl took 6 ms
compilation error: file typo.xsl line 19 element ooutput
xsltStylePreCompute: unknown xsl:ooutput
compilation error: file typo.xsl line 19 element ooutput
xsltParseStylesheetTop: ignoring unknown ooutput element
0

xsltStylePreCompute: only increments the warning-counter

xsltParseStylesheetTop: says it is an error, but increments the warning counter

            xsltTransformError(NULL, style, cur,
                        "xsltParseStylesheetTop: ignoring unknown %s element\n",
                        cur->name);
            if (style != NULL) style->warnings++;
        }

The rational I would like to treat such warnings as errors is, that I use
xsltpro as part of my 'make test' target to see if all stylesheets I package
compile.

Ciao
  Stefan
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