selftest: Fix typo in comment.

Karolin

diff --git a/selftest/gdb_backtrace_test.c b/selftest/gdb_backtrace_test.c
index 506784f67575f26ce21304971d8b7b86649651ab..993596d2c2a931a9ec1c2b48e51d7ff82666b2e6 100644 (file)
--- a/selftest/gdb_backtrace_test.c
+++ b/selftest/gdb_backtrace_test.c
@@ -1,6 +1,6 @@
 /*
 
-add a usefull tool to test the gdb_backtrace script
+add a useful tool to test the gdb_backtrace script
 
 just compile it with
 cc -g -o gdb_backtrace_test gdb_backtrace_test.c