Fixed glfwSetTime accepting invalid values.

Fixes #436.

src/input.c

@@ -28,6 +28,7 @@
 #include "internal.h"
 
 #include <stdlib.h>
+#include <float.h>
 #if defined(_MSC_VER)
  #include <malloc.h>
 #endif
@@ -591,6 +592,13 @@ GLFWAPI double glfwGetTime(void)
 GLFWAPI void glfwSetTime(double time)
 {
     _GLFW_REQUIRE_INIT();
+
+    if (time != time || time - DBL_MAX == time || time < 0.0)
+    {
+        _glfwInputError(GLFW_INVALID_VALUE, "Invalid time");
+        return;
+    }
+
     _glfwPlatformSetTime(time);
 }