R-alpha: Second patch for 0.50-a1: cut(.) fails .. -- PATCH (?!)

[Martin Maechler]

It was not only  cut(.) but also  formatC(.)
whose .C(..) calls gave the
 >>>> Error: character variables must be duplicated in .C/.Fortran

Looking a bit at  src/main/dotcode.c
(and reading Ross' explanation that it was a "variable initialization problem")

I decided to 
REPLACE line 413  in src/main/dotcode.c
which (after the patch) reads
		*dup = 0;
by
		*dup = 1;
---
and yes, this seems to solve the problem.

'make tests' at least works and gives about the same as with  0.50 Alpha-2.

----
Martin
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