lm32: fix build breakage due to uninitialized variable 'r'

gcc 4.5.2 correctly complains that r is potentially uninitialized in this
function.
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

hw/milkymist-pfpu.c

@@ -163,7 +163,7 @@ static int pfpu_decode_insn(MilkymistPFPUState *s)
     uint32_t reg_b = (insn >> 11) & 0x7f;
     uint32_t op = (insn >> 7) & 0xf;
     uint32_t reg_d = insn & 0x7f;
-    uint32_t r;
+    uint32_t r = 0;
     int latency = 0;
 
     switch (op) {

seabios @ 06d0bdd9

-Subproject commit cc975646af69f279396d4d5e1379ac6af80ee637
+Subproject commit 06d0bdd9e2e20377b3180e4986b14c8549b393e4