ddraw/tests: Fix missing void in empty parameter list.

dlls/ddraw/tests/d3d.c

@@ -1635,7 +1635,7 @@ static void D3D7_OldRenderStateTest(void)
 #define IS_VALUE_NEAR(a, b)    ( ((a) == (b)) || ((a) == (b) - 1) || ((a) == (b) + 1) )
 #define MIN(a, b)    ((a) < (b) ? (a) : (b))
 
-static void DeviceLoadTest()
+static void DeviceLoadTest(void)
 {
     DDSURFACEDESC2 ddsd;
     IDirectDrawSurface7 *texture_levels[2][8];

dlls/ddraw/tests/visual.c

@@ -2167,7 +2167,7 @@ static BOOL colortables_check_equality(PALETTEENTRY table1[256], RGBQUAD table2[
     return TRUE;
 }
 
-static void p8_primary_test()
+static void p8_primary_test(void)
 {
     /* Test 8bit mode used by games like StarCraft, C&C Red Alert I etc */
     DDSURFACEDESC ddsd;