This merge will enable negative value validations to succeed when zero is the minimum applied

empty() is true for zero value which is not applicable for numeric values, instead use is_numeric.

code/extensions/EditableNumericFieldExtension.php

@@ -26,10 +26,10 @@ class EditableNumericFieldExtension extends DataExtension
         $def['type'] = 'text-number';
 
         // Numeric validation
-        if(!empty($this->owner->MinValue)) {
+        if(is_numeric($this->owner->MinValue)) {
             $def['min'] = (int)$this->owner->MinValue;
         }
-        if(!empty($this->owner->MaxValue)) {
+        if(is_numeric($this->owner->MaxValue)) {
             $def['max'] = (int)$this->owner->MaxValue;
         }
 
@@ -42,4 +42,4 @@ class EditableNumericFieldExtension extends DataExtension
         }
     }
 
-}
\ No newline at end of file
+}