UPDATE 1-Vivus to submit Qnexa application as limited indication, shares up

* Says decided goals of Qnexa study with FDA * Plans to resubmit Qnexa marketing approval in Q4 as lmtd indication * Q1 loss per shr $0.12 vs est $0.15 * Shares up 6 pct after-market (Follows alerts) May 2 (Reuters) - Drugmaker...