MSVC fix for masked variable warning

Author: jagerman

include/pybind11/cast.h

@@ -152,10 +152,12 @@ class type_info_iterator {
 private:
     // Position when iterating through the vector (MI-only)
     size_t position = 0;
-    void load_mi_type_info(const tuple &bases) {
+    // Loads bases from a multiple inheritance type; takes the first tuple of multiple bases
+    // encountered.
+    void load_mi_type_info(const tuple &init_bases) {
         std::vector<PyTypeObject *> check;
-        check.reserve(bases.size());
-        for (handle parent : bases) {
+        check.reserve(init_bases.size());
+        for (handle parent : init_bases) {
             check.push_back((PyTypeObject *) parent.ptr());
         }
         all.reset(new std::vector<type_info *>());