added error screen, if no mods are in the save

src/vendor/factorioSave/factorioSave.go

@@ -54,6 +54,7 @@ var constraintGreaterThan0_16 *semver.Constraints
 
 func ReadHeader(filePath string) (Header, error) {
 	var err error
+	data = Header{}
 
 	constraintGreaterThan0_16, _ = semver.NewConstraint(">= 0.16.0")
 
@@ -201,7 +202,6 @@ func ReadHeader(filePath string) (Header, error) {
 		data.Mods = append(data.Mods, SingleMod)
 	}
 
-	log.Println(data)
 	return data, nil
 }
 

ui/App/components/Mods/ModLoadSave.jsx

@@ -44,6 +44,14 @@ class ModLoadSave extends React.Component {
                     checkboxes.push(singleCheckbox);
                 });
 
+                if(checkboxes.length == 0) {
+                    swal({
+                        title: "No mods in this save!",
+                        type: "error"
+                    });
+                    return;
+                }
+
                 let table = <div>
                     All Mods will be installed
                     <div style={{display: "flex", width: "100%", justifyContent: "center"}}>