Adjusting/fixing warnings
diff --git a/tests/mathops-test.c b/tests/mathops-test.c
index 7044913..0a54126 100644
--- a/tests/mathops-test.c
+++ b/tests/mathops-test.c
@@ -14,7 +14,7 @@
 
 int ret = 0;
 
-void testdiv()
+void testdiv(void)
 {
    celt_int32_t i;
    for (i=-327670;i<=327670;i++)
@@ -37,7 +37,7 @@
    }
 }
 
-void testsqrt()
+void testsqrt(void)
 {
    celt_int32_t i;
    for (i=1;i<=1000000000;i++)
@@ -55,7 +55,7 @@
    }
 }
 
-int main()
+int main(void)
 {
    testdiv();
    testsqrt();