fixed fun isGf and GoFrameHelperBundle name

Author: oldme-git

src/main/kotlin/com/github/oldmegit/goframehelper/data/Bundle.kt

@@ -3,7 +3,7 @@ package com.github.oldmegit.goframehelper.data
 import com.intellij.DynamicBundle
 import java.util.function.Supplier
 
-object Bundle : DynamicBundle("message.goframehelperBundle") {
+object Bundle : DynamicBundle("message.GoFrameHelperBundle") {
     override fun getMessage(key: String, vararg params: Any?): String {
         return super.getMessage(key, *params)
     }

src/main/kotlin/com/github/oldmegit/goframehelper/gf/GfGoMod.kt

@@ -19,7 +19,7 @@ object GfGoMod {
             val fileContent = file.readText()
             cache.isGf = fileContent.contains(Gf.goModMark)
         }
-        return cache.isGf as Boolean
+        return cache.isGf ?: false
     }
 
     // reset isGf cache