Fix warning on test main functions prototypes.

tests/ksrarrays.c

@@ -2,7 +2,7 @@
 #include <assert.h>
 #include <string.h>
 
-int main(/*int argc, char *argv[]*/)
+int main(void)
 {
 	// try to create arrays.
 	ksrarray *array_tiny = ksrarray_new_tiny();

tests/ksrbuffers.c

@@ -1,7 +1,7 @@
 #include <assert.h>
 #include <ksr/buffers.h>
 
-int main(/*int argc, char *argv[]*/)
+int main(void)
 {
 	// create an empty buffer and check that it is properly instantiated.
 	ksrbuffer *empty_buffer = ksrbuffer_new_empty(30);

tests/ksregex.c

@@ -2,7 +2,7 @@
 #include <ksr/regex.h>
 #include <ksr/string.h>
 
-int main(/*int argc, char *argv[]*/)
+int main(void)
 {
 	// try a simple regex and check that it matches properly.
 	ksregex *reg1 = ksregex_new_nogroup("^[0-9]+$", 0);

tests/ksrfiles.c

@@ -1,7 +1,7 @@
 #include <ksr/files.h>
 #include <assert.h>
 
-int main(/*int argc, char *argv[]*/)
+int main(void)
 {
 	// delete test directory if it exists.
 	system("rm -Rf ksrtesttesttmp");

tests/ksrpromises.c

@@ -14,7 +14,7 @@ void promise_execution_ok(ksrpromise *promise, void *data)
 	ksrpromise_resolve(promise, "OK");
 }
 
-void promise_execution_sigint(/*ksrpromise *promise, void *data*/)
+void promise_execution_sigint(ksrpromise *promise, void *data)
 {
 	// raise a signal to interrupt await.
 	raise(SIGINT);
@@ -44,7 +44,7 @@ void on_promise_failed(int error_code, const char *error_message, void *userdata
 	assert(str_equals("blabla", userdata));
 }
 
-int main(/*int argc, char *argv[]*/)
+int main(void)
 {
 	// try to create a promise.
 	ksrpromise *promise = ksrpromise_new(promise_execution_ok, NULL);

tests/ksrstring.c

@@ -2,7 +2,7 @@
 #include <assert.h>
 #include <ksr/buffers.h>
 
-int main(/*int argc, char *argv[]*/)
+int main(void)
 {
 	assert(str_equals("hello", to_lowercase("heLLo")));
 	assert(str_equals("hello", to_lowercase("HELLO")));