cmd/ebitenmobile: Refactoring

cmd/ebitenmobile/gobind.go

@@ -176,6 +176,12 @@ const objcM = `// Code generated by ebitenmobile. DO NOT EDIT.
 }
 
 - (void)drawFrame{
+  @synchronized(self) {
+    if (!active_) {
+      return;
+    }
+  }
+
   [[self glkView] setNeedsDisplay];
 }
 
@@ -183,13 +189,6 @@ const objcM = `// Code generated by ebitenmobile. DO NOT EDIT.
   if (error_) {
     return;
   }
-
-  @synchronized(self) {
-    if (!active_) {
-      return;
-    }
-  }
-
   NSError* err = nil;
   EbitenmobileviewUpdate(&err);
   if (err != nil) {