Make error handlint more robust in Format_Len_Unicode

xprop.c:1011:2: warning: Function call argument is an uninitialized value
        memcpy(_formatting_buffer, error, strlen(error)+1);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
xprop.c:1011:36: note: instantiated from:
        memcpy(_formatting_buffer, error, strlen(error)+1);
                                          ^      ~~~~~

Found-by: clang static analysis
Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/xprop.c b/xprop.c
index b870d97..4c4c702 100644
--- a/xprop.c
+++ b/xprop.c
@@ -999,6 +999,8 @@ Format_Len_Unicode (const char *string, int len)
 	    error = "<Invalid UTF-8 string: Tail too short> "; break;
 	  case UTF8_LONG_TAIL:
 	    error = "<Invalid UTF-8 string: Tail too long> "; break;
+	  default:
+	    error = "<Invalid UTF-8 string: Unknown error>"; break;
 	}
 
 	result = Format_Len_String(string, len);