ppc: add PPC_BC_INVALID
diff --git a/include/ppc.h b/include/ppc.h
index ef13d58..5dc894d 100644
--- a/include/ppc.h
+++ b/include/ppc.h
@@ -17,6 +17,7 @@
 
 //> PPC branch codes for some branch instructions
 typedef enum ppc_bc {
+	PPC_BC_INVALID  = 0,
 	PPC_BC_LT       = (0 << 5) | 12,
 	PPC_BC_LE       = (1 << 5) |  4,
 	PPC_BC_EQ       = (2 << 5) | 12,