Make STB_Image and the demos C89 compatible

Author: FrostKiwi

demo/common/file_browser.c

@@ -1,12 +1,12 @@
-#include <string.h> // strcpy, strlen
+#include <string.h> /* strcpy, strlen */
 
-#ifdef __unix__
-#include <dirent.h>
-#include <unistd.h>
+#if defined(__unix__) || defined(__MINGW64__)
+    #include <dirent.h>
+    #include <unistd.h>
 #endif
 
 #ifndef _WIN32
-# include <pwd.h>
+    #include <pwd.h>
 #endif
 
 struct icons {
@@ -110,12 +110,11 @@ icon_load(const char *filename)
 
     glGenTextures(1, &tex);
     glBindTexture(GL_TEXTURE_2D, tex);
-    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
-    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_NEAREST);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, x, y, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
-    glGenerateMipmap(GL_TEXTURE_2D);
     stbi_image_free(data);
     return nk_image_id((int)tex);
 }

demo/common/image.c

@@ -1,6 +1,6 @@
 /* STB Image does not compile as C89 :[ */
 #define STB_IMAGE_IMPLEMENTATION
-#include "../../demo/common/filebrowser/stb_image.h"
+#include "../../demo/common/libs/stb_image_c89.h"
 
 struct testImage {
 	GLuint gpuTextureID;