Reestablish method TPythia6::Pytune  (see https://root.cern.ch/phpBB3/viewtopic.php?f=3&t=20399&p=87881#p87881)

in libPythia6 (generates unresolved symbol error).


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  void TPythia6::Pygive(const char *param)


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eg, g4root, pythia6, pythia8, vmc


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Fix some bugs in the "Pythia-6" interface:
1. the "pyuppr" /PYUPPR/ common DOES NOT EXIST in Pythia-6 fortran code;
   all references to it (and to all variables that it "declares": NUP,
   KUP, NFUP, IFUP, PUP, Q2UP) are void.
2. the "pyssmt" /PYSSMT/ common IS TOO SHORT with respect to Pythia-6
   fortran code; the "pythia6_common_address.c" should define it as:
	int pyssmt[2*4*4+2*2*2+2*2*2+2*4+2*2+2*4*16+2*4*4+2*2*2+2*2*2];
   and the file "./pythia6/inc/TPythia6Calls.h" should declare it as:
	struct Pyssmt_t {
		double ZMIX[4][4];
		double UMIX[2][2];
		double VMIX[2][2];
		double SMZ[4];
		double SMW[2];
		double SFMIX[4][16];
		double ZMIXI[4][4];
		double UMIXI[2][2];
		double VMIXI[2][2];
	};


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- Fix calculation of scroll bars position for 
  i.e. list tree with large number of items


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In the inline function TPythia6::GetPROC(i), set explicitily the termination character number 27 to take into account the fact that in Fortran there is no
character terminator.


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"I have implemented all copy and equal operators needed to silence all
warnings in AliRoot, as requested. I have implemented shallow copies as
would do the default operators synthetized by the compiler.
Most operators are protected. If users complain, you just have to move
them into the public area, but class derivation is of course supported.
It has been a terrible job, I have modified 278 files, but the changes
are backward compabile, and this goes a long way to permitting user to
use the effc++ flag with root headers."


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Introduce new class TPythia6Decayer


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In GetKFIN and SetKFIN replace statements like
fPysubs->KFIN[j-1][i-1] = kfin;
by
fPysubs->KFIN[j+40][i-1] = kfin;
Following the Pythia manual, SetKFIN may be called with negative
values of j.


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"on Nick's request I have added the two methods
Pymass and Pychge to TPythia6.
Also ImportParticles is called after a Pyedit call."


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of the common block /pydat3/. The new definition is
struct Pydat3_t {
  int    MDCY[3][500];
  int    MDME[2][KNDCAY];
  double BRAT[KNDCAY];
  int    KFDP[5][KNDCAY];
};

instead of:
struct Pydat3_t {
  int    MDCY[3][500];
  int    MDME[2][4000];
  double BRAT[4000];
  int    KFDP[5][4000];
};

where KNDCAY=8000. To run with the previous version of Pythia5.1,
simply change KNDCAY from 8000 to 4000.


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Fix some typos.


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which included commits to RCS files with non-trunk default branches.


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