Fixed bug 1646 - Warnings from clang with -Weverything

src/test/SDL_test_fuzzer.c

@@ -443,7 +443,7 @@ SDLTest_RandomSint64BoundaryValue(Sint64 boundary1, Sint64 boundary2, SDL_bool v
 float
 SDLTest_RandomUnitFloat()
 {
-    return (float) SDLTest_RandomUint32() / UINT_MAX;
+    return SDLTest_RandomUint32() / (float) UINT_MAX;
 }
 
 float

src/test/SDL_test_harness.c

@@ -206,7 +206,7 @@ SDLTest_SetTestTimeout(int timeout, void (*callback)())
 /**
 * \brief Timeout handler. Aborts test run and exits harness process.
 */
-static void
+static SDL_NORETURN void
 SDLTest_BailOut()
 {
     SDLTest_LogError("TestCaseTimeout timer expired. Aborting test run.");

src/test/SDL_test_log.c

@@ -26,7 +26,9 @@
 */
 
 /* quiet windows compiler warnings */
-#define _CRT_SECURE_NO_WARNINGS
+#if defined(_MSC_VER)
+# define _CRT_SECURE_NO_WARNINGS
+#endif
 
 #include "SDL_config.h"