COMP: Avoid warnings about the use of uninitialized values.

Compilers may warn oub the use of possible uninitalized value,
so assign integer, float, and double parameters to zero if
there is no default value.
Merge pull request #12 from thewtex/ValueInitialization

COMP: Avoid warnings about the use of uninitialized values.
Add ModuleDescription::FindParametersWithDefaultValue()
Merge branch 'find-parameters'

* find-parameters:
  Add ModuleDescription::FindParametersWithDefaultValue()