Update equal-txt.ts

Handle event where txt a or b can be undefined
#47

src/lib/utils/equal-txt.ts

@@ -1,4 +1,5 @@
 export default function equalTxt(a: Record<string, string>, b: Record<string, string>): boolean {
+    if(a === undefined || b === undefined) return false
     let aKeys = Object.keys(a)
     let bKeys = Object.keys(b)
     if(aKeys.length != bKeys.length) return false