[vkgen] Clean up an unnecessary function redirect

I think it was mostly a holdover from early development, but it
certainly makes sense to tuck the functionality away in Struct.

libs/video/renderer/vulkan/vkgen/vkgen.r

@@ -97,12 +97,6 @@ void print_type (qfot_type_t *type)
 	}
 }
 
-void struct_func (qfot_var_t *var)
-{
-	Type       *type = [Type findType:var.type];
-	[type addToQueue];
-}
-
 void
 scan_types (void)
 {
@@ -208,7 +202,7 @@ main(int argc, string *argv)
 			if ([[parse getObjectForKey:[obj name]] string] == "skip") {
 				continue;
 			}
-			[obj forEachFieldCall:struct_func];
+			[obj queueFieldTypes];
 		}
 		[output_types addObject:obj];
 	}

libs/video/renderer/vulkan/vkgen/vkstruct.h

@@ -12,7 +12,7 @@
 {
 	string outname;
 }
--(void) forEachFieldCall: (varfunc) func;
+-(void) queueFieldTypes;
 -(qfot_var_t *)findField:(string) fieldName;
 -(void) writeTable;
 -(void) writeSymtabInit;

libs/video/renderer/vulkan/vkgen/vkstruct.r

@@ -27,12 +27,13 @@
 	}
 }
 
--(void) forEachFieldCall: (varfunc) func
+-(void) queueFieldTypes
 {
 	qfot_struct_t *strct =&type.strct;
 
 	for (int i = 0; i < strct.num_fields; i++) {
-		func (&strct.fields[i]);
+		Type       *type = [Type findType:var.type];
+		[type addToQueue];
 	}
 }