ARM back-end: Fix encode_imm

the encode_imm function in tcg/arm/tcg-target.c lacks shift declaration.

Laurent

Signed-off-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Signed-off-by: Andrzej Zaborowski <andrew.zaborowski@intel.com>

tcg/arm/tcg-target.c

diff --git a/tcg/arm/tcg-target.c b/tcg/arm/tcg-target.c
index 525994c..8c38578 100644
--- a/tcg/arm/tcg-target.c
+++ b/tcg/arm/tcg-target.c
@@ -188,6 +188,8 @@
    right-rotated by an even amount between 0 and 30. */
 static inline int encode_imm(uint32_t imm)
 {
+    int shift;
+
     /* simple case, only lower bits */
     if ((imm & ~0xff) == 0)
         return 0;