Hush an -Og warning.

It's non-obvious that dims will never be more than 4.  Even if at higher
optimization numbers the compiler notices this, I as a human still failed
to do so after first two readings.

1 files changed, 4 insertions, 2 deletions

diff --git a/crawl-ref/source/l_crawl.cc b/crawl-ref/source/l_crawl.cc
index 7412bb98a6..fd6e63ea63 100644
--- a/crawl-ref/source/l_crawl.cc
+++ b/crawl-ref/source/l_crawl.cc
@@ -724,8 +724,8 @@ static int crawl_simplex(lua_State *ls)
     }
 
     double result;
-    if (dims < 2) return 0; // TODO: Throw error?
-    switch (dims) {
+    switch (dims)
+    {
     case 2:
         result = perlin::noise(vals[0],vals[1]);
         break;
@@ -735,6 +735,8 @@ static int crawl_simplex(lua_State *ls)
     case 4:
         result = perlin::noise(vals[0],vals[1],vals[2],vals[3]);
         break;
+    default:
+        return 0; // TODO: Throw error?
     }
     lua_pushnumber(ls, result);