python-matplotlib: update to 3.5.2

mingw-w64-python-matplotlib/0001-move-variable-initialization.patch

@@ -0,0 +1,18 @@
+--- a/src/_tkagg.cpp
++++ b/src/_tkagg.cpp
+@@ -259,6 +259,7 @@
+     HANDLE process = GetCurrentProcess();  // Pseudo-handle, doesn't need closing.
+     HMODULE* modules = NULL;
+     DWORD size;
++    bool tcl_ok = false, tk_ok = false;
+     if (!EnumProcessModules(process, NULL, 0, &size)) {
+         PyErr_SetFromWindowsErr(0);
+         goto exit;
+@@ -271,7 +272,6 @@
+         PyErr_SetFromWindowsErr(0);
+         goto exit;
+     }
+-    bool tcl_ok = false, tk_ok = false;
+     for (unsigned i = 0; i < size / sizeof(HMODULE); ++i) {
+         if (!tcl_ok) {
+             tcl_ok = load_tcl(modules[i]);