Silently ignoring empty lines

Cocoa/Document.m

@@ -309,7 +309,7 @@ static uint32_t rgbEncode(GB_gameboy_t *gb, unsigned char r, unsigned char g, un
 
 - (IBAction)consoleInput:(NSTextField *)sender {
     NSString *line = [sender stringValue];
-    if ([line isEqualToString:@""]) {
+    if ([line isEqualToString:@""] && lastConsoleInput) {
         line = lastConsoleInput;
     }
     else if (line) {

Core/debugger.c

@@ -610,6 +610,9 @@ next_command:
         gb->debug_next_command = false;
         gb->debug_fin_command = false;
         input = gb->input_callback(gb);
+        if (!input[0]) {
+            goto next_command;
+        }
 
         char *command_string = input;
         char *arguments = strchr(input, ' ');