Fix crash when looking up a CPU in the Knowledge section

Thanks: hexagonrecursion
Closes: singularity#347

Author: nthykier

singularity/code/item.py

@@ -157,6 +157,7 @@ def get_quality_info(self, if_installed_in_base=None, count=1):
         for qual, value in self.item_qual.items():
             if qual == "cpu":
                 current_value = value
+                pending_value = value
                 modifier = 10000
                 pending_modifier = 10000
                 if if_installed_in_base is not None: