Bug 473705: Enable SVG Animation (SMIL) support in builds by default. r+sr=roc

configure.in

@@ -5847,10 +5847,15 @@ fi
 dnl ========================================================
 dnl SMIL
 dnl ========================================================
-MOZ_ARG_ENABLE_BOOL(smil,
-[  --enable-smil            Enable SMIL animation support],
-    MOZ_SMIL=1,
-    MOZ_SMIL= )
+MOZ_SMIL=1
+MOZ_ARG_DISABLE_BOOL(smil,
+[  --disable-smil           Disable SMIL animation support],
+    MOZ_SMIL=,
+    MOZ_SMIL=1 )
+# Automatically disable SMIL if SVG is disabled
+if test -z "$MOZ_SVG"; then
+  MOZ_SMIL=
+fi
 if test -n "$MOZ_SMIL"; then
   AC_DEFINE(MOZ_SMIL)
 fi