Remove duplicate item to avoid compiling error

The gcc 4.5 complains about the duplicate item:

external/svox/pico/lib/picosig2.c: In function 'sigAllocate':
external/svox/pico/lib/picosig2.c:75:26: error: operation on 'sig_inObj->int_vec38' may be undefined

Change-Id: I4532b770ff02e058253ed01cbed50b0efb8a83ce
1 file changed