Fixed various VC++ warnings.

src/CMakeLists.txt

@@ -1,3 +1,4 @@
+
 include_directories(${GLFW_SOURCE_DIR}/src
                     ${GLFW_BINARY_DIR}/src
                     ${glfw_INCLUDE_DIRS})
@@ -38,6 +39,10 @@ elseif (_GLFW_X11_GLX)
     endif()
 endif()
 
+if (MSVC)
+    add_definitions(-D_CRT_SECURE_NO_WARNINGS)
+endif()
+
 add_library(glfw ${glfw_SOURCES} ${glfw_HEADERS})
 set_target_properties(glfw PROPERTIES OUTPUT_NAME "${GLFW_LIB_NAME}")