src/StringUtils.hpp: Added some explicit type casts in order to suppress compilation warnings. Also, unused variables char tmpbuf[10], format[10] where deleted.
src/StringUtils.hpp: Added some explicit type casts in order to suppress compilation warnings. Also, unused variables char tmpbuf[10], format[10] where deleted.

git-svn-id: 6625e4d6743179724b113c04fbf297d122273a36@167 108fab2b-820f-0410-9f2c-e5cc2c41d7be

ianmartin/GPSTk,ianmartin/GPSTk,ianmartin/GPSTk,ianmartin/GPSTk,ianmartin/GPSTk,ianmartin/GPSTk