test cases: Don't fall off the end of main() without an exit status

This is undefined behaviour, and seems to have caused test failures
when backporting Meson to an older toolchain in the Steam Runtime.

Signed-off-by: Simon McVittie <smcv@collabora.com>

3 files changed, 3 insertions, 0 deletions

diff --git a/test cases/common/141 special characters/arg-char-test.c b/test cases/common/141 special characters/arg-char-test.c
index 04e02f8..044857e 100644
--- a/test cases/common/141 special characters/arg-char-test.c
+++ b/test cases/common/141 special characters/arg-char-test.c
@@ -7,4 +7,5 @@ int main(int argc, char **argv) {
   if (c != argv[1][0])
     fprintf(stderr, "Expected %x, got %x\n", (unsigned int) c, (unsigned int) argv[1][0]);
   assert(c == argv[1][0]);
+  return 0;
 }
diff --git a/test cases/common/141 special characters/arg-string-test.c b/test cases/common/141 special characters/arg-string-test.c
index 199fd79..1d93f45 100644
--- a/test cases/common/141 special characters/arg-string-test.c
+++ b/test cases/common/141 special characters/arg-string-test.c
@@ -9,4 +9,5 @@ int main(int argc, char **argv) {
   if (s[0] != argv[1][0])
     fprintf(stderr, "Expected %x, got %x\n", (unsigned int) s[0], (unsigned int) argv[1][0]);
   assert(s[0] == argv[1][0]);
+  return 0;
 }
diff --git a/test cases/common/141 special characters/arg-unquoted-test.c b/test cases/common/141 special characters/arg-unquoted-test.c
index 7f679ca..9c51bff 100644
--- a/test cases/common/141 special characters/arg-unquoted-test.c
+++ b/test cases/common/141 special characters/arg-unquoted-test.c
@@ -14,4 +14,5 @@ int main(int argc, char **argv) {
   assert(s[0] == argv[1][0]);
   // There is no way to convert a macro argument into a character constant.
   // Otherwise we'd test that as well
+  return 0;
 }