[PATCH master+STABLE-0.15] Fix default accelerator when configured with --disable-kvm

["Daniel P. Berrange" <berrange@redhat.com>]

From: "Daniel P. Berrange" <berrange@redhat.com>

The default accelerator is hardcoded to 'kvm'. This is a fine
default for qemu-kvm normally, but if the user built with
./configure --disable-kvm, then the resulting binaries will
not work by default

* vl.c: Default to 'tcg' unless CONFIG_KVM is defined
---
 vl.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/vl.c b/vl.c
index 7ae549e..28fd2f3 100644
--- a/vl.c
+++ b/vl.c
@@ -1953,8 +1953,13 @@ static int configure_accelerator(void)
     }
 
     if (p == NULL) {
+#ifdef CONFIG_KVM
         /* Use the default "accelerator", kvm */
         p = "kvm";
+#else
+        /* Use the default "accelerator", tcg */
+        p = "tcg";
+#endif
     }
 
     while (!accel_initalised && *p != '\0') {
-- 
1.7.6