Fix type inconsistency.

Diana · web-flow · commit 635807352444 · 2017-12-02T15:43:52.000-05:00
glfwGetRequiredInstanceExtensions takes a uint32_t, and it's best for portable code to be explicit in its types.
diff --git a/03_Drawing_a_triangle/00_Setup/01_Instance.md b/03_Drawing_a_triangle/00_Setup/01_Instance.md
@@ -62,7 +62,7 @@ the window system. GLFW has a handy built-in function that returns the
 extension(s) it needs to do that which we can pass to the struct:
 
 ```c++
-unsigned int glfwExtensionCount = 0;
+uint32_t glfwExtensionCount = 0;
 const char** glfwExtensions;
 
 glfwExtensions = glfwGetRequiredInstanceExtensions(&glfwExtensionCount);
