fix reversed condition

Author: rixo

lib/make-hot.js

@@ -150,7 +150,7 @@ const parseCssId = (code, parseHash, originalCode, compileCss) => {
     if (!parseHash) return {}
     // guard: compile.css is true, so we should have found the add_css function,
     //        something unexpected is unraveling here, fall back to caution
-    if (!compileCss) return {}
+    if (compileCss) return {}
     // trying to get CSS id the same way as Svelte does it
     match = /<style[^>]*>([\s\S]*)<\/\s*style\s*>/.exec(originalCode)
     const cssHash = match && match[1] ? stringHashcode(match[1]) : null