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Don't print extra newlines on error before awk starts parsing. (#97)

If awk prints an error message while when compile_time is still set
to ERROR_PRINTING, don't try to print the context since there is
none.  This can happen due to a problem with, e.g., unknown command
line options.

--- a/lib.c

+++ b/lib.c

@@ -669,12 +669,11 @@

 			fprintf(stderr, " source line number %d", curnode->lineno);

 		else if (lineno)

 			fprintf(stderr, " source line number %d", lineno);

+		if (compile_time == COMPILING && cursource() != NULL)

+			fprintf(stderr, " source file %s", cursource());

+		fprintf(stderr, "\n");

+		eprint();

 	}

-

-	if (compile_time == COMPILING && cursource() != NULL)

-		fprintf(stderr, " source file %s", cursource());

-	fprintf(stderr, "\n");

-	eprint();

 }

 void eprint(void)	/* try to print context around error */

-- 

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