problems introduced into TS code

[Barry Smith]

libfast in: /home/buildbot/slave/build/ 
x86_linux_single_nosched_gcc-4.1_gfortran-4.1_python-2.5_openmpi/PETSc/ 
dev/default-825/src/ts/impls/explicit/ssp ssp.c: In function  
'PetscErrorCode SSPStep_RK_3(_p_TS*, PetscReal, PetscReal, _p_Vec*)':  
ssp.c:101: warning: converting to 'PetscInt' from 'double' libfast  
in: /home/buildbot/slave/build/ 
x86_linux_single_nosched_gcc-4.1_gfortran-4.1_python-2.5_openmpi/PETSc/ 
dev/default-825/src/ts/impls/implicit libfast in: /home/buildbot/slave/ 
build/x86_linux_single_nosched_gcc-4.1_gfortran-4.1_python-2.5_openmpi/ 
PETSc/dev/default-825/src/ts/impls/implicit/beuler libfast in: /home/ 
buildbot/slave/build/ 
x86_linux_single_nosched_gcc-4.1_gfortran-4.1_python-2.5_openmpi/PETSc/ 
dev/default-825/src/ts/impls/implicit/cn libfast in: /home/buildbot/ 
slave/build/ 
x86_linux_single_nosched_gcc-4.1_gfortran-4.1_python-2.5_openmpi/PETSc/ 
dev/default-825/src/ts/impls/implicit/theta libfast in: /home/buildbot/ 
slave/build/ 
x86_linux_single_nosched_gcc-4.1_gfortran-4.1_python-2.5_openmpi/PETSc/ 
dev/default-825/src/ts/impls/implicit/gl gl.c: In function  
'PetscErrorCode TSGLCompleteStep_Rescale(_TSGLScheme*, PetscReal,  
_TSGLScheme*, PetscReal, _p_Vec**, _p_Vec**, _p_Vec**)': gl.c:338:  
warning: converting to 'PetscInt' from 'PetscReal'