Fixed linecount to be -1 for fallback

Author: Deep Furiya

src/document/Document.ts

@@ -170,7 +170,7 @@ export class Document {
             cfnType: this.cfnFileType,
             languageId: this.languageId ?? '',
             version: this.version ?? 0,
-            lineCount: this.lineCount ?? 0,
+            lineCount: this.lineCount ?? -1,
         };
     }
 

src/resourceState/ResourceStateImporter.ts

@@ -420,7 +420,7 @@ export class ResourceStateImporter {
                         : { line: resourcesSection.endPosition.row + 1, character: 0 };
             } else {
                 // Find the last non-empty line
-                let lastNonEmptyLine = (document.lineCount ?? 1) - 1;
+                let lastNonEmptyLine = document.lineCount ? document.lineCount - 1 : 0;
                 while (lastNonEmptyLine >= 0 && document.getLine(lastNonEmptyLine)?.trim().length === 0) {
                     lastNonEmptyLine--;
                 }
@@ -434,7 +434,11 @@ export class ResourceStateImporter {
             };
         }
 
-        let line = resourcesSection ? resourcesSection.endPosition.row : (document.lineCount ?? 1) - 1;
+        let line = resourcesSection
+            ? resourcesSection.endPosition.row
+            : document.lineCount
+              ? document.lineCount - 1
+              : 0;
 
         // For JSON without Resources section, check if file is essentially empty
         if (!resourcesSection) {