Introduced a protected method retypeCanonicalTypesOfCast() to CtoFormulaConverter. Provided a custom implementation in CToFormulaConverterWithArrays. 


git-svn-id: https://svn.sosy-lab.org/software/cpachecker/branches/arrays@15006 4712c6d2-40bb-43ae-aa4b-fec3f1bdfe4c