patch 8.1.0380: "make proto" doesn't work well
Problem: "make proto" doesn't work well.
Solution: Define a few more types for cproto. Update proto files. Fix that
workshop didn't build.
diff --git a/src/protodef.h b/src/protodef.h
new file mode 100644
index 0000000..42a6cce
--- /dev/null
+++ b/src/protodef.h
@@ -0,0 +1,18 @@
+/* vi:set ts=8 sts=4 sw=4 noet:
+ *
+ * VIM - Vi IMproved by Bram Moolenaar
+ *
+ * Do ":help uganda" in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ */
+
+#ifdef PROTO
+// cproto runs into trouble when these types are missing
+typedef double _Float16;
+typedef double _Float32;
+typedef double _Float64;
+typedef double _Float128;
+typedef double _Float32x;
+typedef double _Float64x;
+#endif
+