C++: SloppyGlobal: Don't alert on template instantiations, only the template

cpp/ql/src/Best Practices/SloppyGlobal.ql

@@ -14,6 +14,9 @@ import semmle.code.cpp.ConfigurationTestFile
 from GlobalVariable gv
 where
   gv.getName().length() <= 3 and
+  // We will give an alert for the TemplateVariable, so we don't
+  // need to also give one for each instantiation
+  not gv instanceof VariableTemplateInstantiation and
   not gv.isStatic() and
   not gv.getFile() instanceof ConfigurationTestFile // variables in files generated during configuration are likely false positives
 select gv,