SDL_OpenURL (macOS): try to open path if the url cannot be opened (#4830)

* SDL_OpenURL (macOS): try to open path if the url cannot be opened

* SDL_OpenURL (macOS): use CFURLCreateWithBytes & LSOpenCFURLRef to correctly escape input

* fix type casting + indentation

src/misc/macosx/SDL_sysurl.m

@@ -27,10 +27,10 @@ int
 SDL_SYS_OpenURL(const char *url)
 { @autoreleasepool
 {
-    NSString *nsstr = [NSString stringWithUTF8String:url];
-    NSURL *nsurl = [NSURL URLWithString:nsstr];
-    return [[NSWorkspace sharedWorkspace] openURL:nsurl] ? 0 : -1;
+    CFURLRef cfurl = CFURLCreateWithBytes(NULL, (const UInt8 *) url, SDL_strlen(url), kCFStringEncodingUTF8,  NULL);
+    OSStatus status = LSOpenCFURLRef(cfurl, NULL);
+    CFRelease(cfurl);
+    return status == noErr ? 0 : -1;
 }}
 
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-