gdi32/tests: Use BOOL type where appropriate.

dlls/gdi32/tests/mapping.c

@@ -513,7 +513,7 @@ static void test_isotropic_mapping(void)
 static void test_setvirtualresolution(void)
 {
     HDC hdc = CreateICA("DISPLAY", NULL, NULL, NULL);
-    DWORD r;
+    BOOL r;
     INT horz_res = GetDeviceCaps(hdc, HORZRES);
     INT horz_size = GetDeviceCaps(hdc, HORZSIZE);
     INT log_pixels_x = GetDeviceCaps(hdc, LOGPIXELSX);

dlls/gdi32/tests/path.c

@@ -270,7 +270,8 @@ static void test_widenpath(void)
     HDC hdc = GetDC(0);
     HPEN greenPen, narrowPen;
     POINT pnt[6];
-    INT nSize, ret;
+    INT nSize;
+    BOOL ret;
 
     /* Create a pen to be used in WidenPath */
     greenPen = CreatePen(PS_SOLID, 10, RGB(0,0,0));