do not generate member functions with empty names

Closes #202

Author: Vexu

src/Scope.zig

@@ -289,6 +289,7 @@ pub const Root = struct {
 
                 const last_index = std.mem.lastIndexOf(u8, func_name, "_");
                 const last_name = if (last_index) |index| func_name[index + 1 ..] else continue;
+                if (last_name.len == 0) continue;
                 var same_count: u32 = 0;
                 const gop = try member_names.getOrPutValue(gpa, last_name, same_count);
                 if (gop.found_existing) {

test/cases/translate/detect_member_func.c

@@ -8,6 +8,7 @@ int baz(Foo *foo);
 int libsomething_quux(Foo *foo);
 int foo1_bar(Foo *foo);
 int foo2_bar(Foo *foo);
+int foo3_(Foo *foo);
 
 typedef union {
     int foo;
@@ -39,6 +40,7 @@ int opa_foo2_bar(OpaFoo *foo);
 // pub extern fn libsomething_quux(foo: [*c]Foo) c_int;
 // pub extern fn foo1_bar(foo: [*c]Foo) c_int;
 // pub extern fn foo2_bar(foo: [*c]Foo) c_int;
+// pub extern fn foo3_(foo: [*c]Foo) c_int;
 // pub const UFoo = extern union {
 //     foo: c_int,
 //     numb: f32,