ticket:10273 DecimalFormat::getFixedDecimal(), improved handling of rounding, overflow.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@34280 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10379: fixes for IBM i - asciism, fix some test cases

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@34281 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10273: fix compilation failure on some platforms, also reorder zero-initializers to avoid warning

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@34282 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10039: Per API review: Add consts, add unumsys_getDescription(), improve documentation

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@34283 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10273: fix compilation failure in test- need LL for long long


git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@34284 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10379: fixes for IBM i - ambiguous types

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@34285 251d0590-4201-4cf1-90de-194747b24ca1