Examples: Renamed glfw error callback for clarity.

examples/opengl2_example/main.cpp

diff --git a/examples/opengl2_example/main.cpp b/examples/opengl2_example/main.cpp
index 3706068..6728347 100644
--- a/examples/opengl2_example/main.cpp
+++ b/examples/opengl2_example/main.cpp
@@ -11,7 +11,7 @@
 #include <stdio.h>
 #include <GLFW/glfw3.h>
 
-static void error_callback(int error, const char* description)
+static void glfw_error_callback(int error, const char* description)
 {
     fprintf(stderr, "Error %d: %s\n", error, description);
 }
@@ -19,7 +19,7 @@
 int main(int, char**)
 {
     // Setup window
-    glfwSetErrorCallback(error_callback);
+    glfwSetErrorCallback(glfw_error_callback);
     if (!glfwInit())
         return 1;
     GLFWwindow* window = glfwCreateWindow(1280, 720, "ImGui OpenGL2 example", NULL, NULL);

examples/opengl3_example/main.cpp

diff --git a/examples/opengl3_example/main.cpp b/examples/opengl3_example/main.cpp
index 143dcc5..ce2f115 100644
--- a/examples/opengl3_example/main.cpp
+++ b/examples/opengl3_example/main.cpp
@@ -9,7 +9,7 @@
 #include <GL/gl3w.h>    // This example is using gl3w to access OpenGL functions (because it is small). You may use glew/glad/glLoadGen/etc. whatever already works for you.
 #include <GLFW/glfw3.h>
 
-static void error_callback(int error, const char* description)
+static void glfw_error_callback(int error, const char* description)
 {
     fprintf(stderr, "Error %d: %s\n", error, description);
 }
@@ -17,7 +17,7 @@
 int main(int, char**)
 {
     // Setup window
-    glfwSetErrorCallback(error_callback);
+    glfwSetErrorCallback(glfw_error_callback);
     if (!glfwInit())
         return 1;
     glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);

examples/vulkan_example/main.cpp

diff --git a/examples/vulkan_example/main.cpp b/examples/vulkan_example/main.cpp
index 1631c8d..79ceb8b 100644
--- a/examples/vulkan_example/main.cpp
+++ b/examples/vulkan_example/main.cpp
@@ -583,7 +583,7 @@
     g_FrameIndex = (g_FrameIndex + 1) % IMGUI_VK_QUEUED_FRAMES;
 }
 
-static void error_callback(int error, const char* description)
+static void glfw_error_callback(int error, const char* description)
 {
     fprintf(stderr, "Error %d: %s\n", error, description);
 }
@@ -591,7 +591,7 @@
 int main(int, char**)
 {
     // Setup window
-    glfwSetErrorCallback(error_callback);
+    glfwSetErrorCallback(glfw_error_callback);
     if (!glfwInit())
         return 1;