fixed a crash on error
--HG-- extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%40168
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@ -1751,7 +1751,7 @@ restart:
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sym=cursym;
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if (matchtoken('[') || matchtoken('{') || matchtoken('(')) {
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tok=tokeninfo(&val,&st); /* get token read by matchtoken() */
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magic_string = (sym->tag == pc_tag_string && sym->dim.array.level == 0);
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magic_string = (sym && (sym->tag == pc_tag_string && sym->dim.array.level == 0));
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if (sym==NULL && symtok!=tSYMBOL) {
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/* we do not have a valid symbol and we appear not to have read a valid
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* symbol name (so it is unlikely that we would have read a name of an
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