CPP: Fix similar queries.

Author: geoffw0

cpp/ql/src/Security/CWE/CWE-468/IncorrectPointerScalingChar.ql

@@ -89,6 +89,7 @@ predicate defSourceType(SsaDefinition def, LocalScopeVariable v,
   | p = v and
     def.definedByParameter(p) and
     sourceType = p.getType().getUnspecifiedType() and
+    strictcount(p.getType()) = 1 and
     isPointerType(sourceType) and
     sourceLoc = p.getLocation())
 }

cpp/ql/src/Security/CWE/CWE-468/IncorrectPointerScalingVoid.ql

@@ -89,6 +89,7 @@ predicate defSourceType(SsaDefinition def, LocalScopeVariable v,
   | p = v and
     def.definedByParameter(p) and
     sourceType = p.getType().getUnspecifiedType() and
+    strictcount(p.getType()) = 1 and
     isPointerType(sourceType) and
     sourceLoc = p.getLocation())
 }