ALSA: drivers: opl3: assignment of a pointer that is not used, probable bug

["Colin King (gmail)" <colin.i.king@gmail.com>]

Hi,

static analysis with scan-build has found an assignment to vp2 that is 
never used in function snd_opl3_note_on(), 
sound/drivers/opl3/opl3_midi.c as follows:

         if (instr_4op) {
                 vp2 = &opl3->voices[voice + 3];
                 if (vp->state > 0) {
                         opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK +
                                                voice_offset + 3);
                         reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT;
                         opl3->command(opl3, opl3_reg, reg_val);
                 }
         }

sound/drivers/opl3/opl3_midi.c:399:3: warning: Value stored to 'vp2' is 
never read [deadcode.DeadStores]
                 vp2 = &opl3->voices[voice + 3];
                 ^     ~~~~~~~~~~~~~~~~~~~~~~~~

I suspect that references to vp in this if block should be to vp2, but 
I'm unsure if that is for all references or not, hence I'm reporting 
this issue.

Coln