tools: Remove length check on device UDID arguments to support newer devices

The 40 characters length check on the device UDID made newer devices unusable
with the libimobiledevice tools and was actually redundant since an invalid
UDID will always fail to resolve. This commit removes the length check
alltogether (but makes sure it is not an empty string "").

1 files changed, 2 insertions, 2 deletions

diff --git a/tools/idevicescreenshot.c b/tools/idevicescreenshot.c
index 74acdf6..f2bcd48 100644
--- a/tools/idevicescreenshot.c
+++ b/tools/idevicescreenshot.c
@@ -55,7 +55,7 @@ int main(int argc, char **argv)
                 }
                 else if (!strcmp(argv[i], "-u") || !strcmp(argv[i], "--udid")) {
                         i++;
-                        if (!argv[i] || (strlen(argv[i]) != 40)) {
+                        if (!argv[i] || !*argv[i]) {
                                 print_usage(argc, argv);
                                 return 0;
                         }
@@ -158,7 +158,7 @@ void print_usage(int argc, char **argv)
         printf("NOTE: A mounted developer disk image is required on the device, otherwise\n");
         printf("the screenshotr service is not available.\n\n");
         printf("  -d, --debug\t\tenable communication debugging\n");
-        printf("  -u, --udid UDID\ttarget specific device by its 40-digit device UDID\n");
+        printf("  -u, --udid UDID\ttarget specific device by UDID\n");
         printf("  -h, --help\t\tprints usage information\n");
         printf("\n");
         printf("Homepage: <" PACKAGE_URL ">\n");