Updated stb_image to 2.30 (src)

Author: betajippity

README.md

@@ -14,7 +14,7 @@ Nuparu currently consists of:
 * [jsoncpp](https://github.com/open-source-parsers/jsoncpp) 1.9.6 (Mac/Win/Linux)
 * [Imath](https://github.com/AcademySoftwareFoundation/Imath) 3.1.12 (Mac/Win/Linux)
 * [OpenEXR](https://github.com/AcademySoftwareFoundation/openexr) 3.3.4 (Mac/Win/Linux)
-* [stb_image](https://github.com/nothings/stb) 2.29 (Src)
+* [stb_image](https://github.com/nothings/stb) 2.30 (Src)
 * [Ptex](http://ptex.us) 2.4.3 (Mac/Win/Linux)
 * [Partio](https://www.disneyanimation.com/technology/partio.html) 1.19.0 (Mac/Win/Linux)
 * [RMSD](http://boscoh.com/code/) (Src)

include/stb_image/stb_image.h

@@ -1,4 +1,4 @@
-/* stb_image - v2.29 - public domain image loader - http://nothings.org/stb
+/* stb_image - v2.30 - public domain image loader - http://nothings.org/stb
                                   no warranty implied; use at your own risk
 
    Do this:
@@ -48,6 +48,7 @@ LICENSE
 
 RECENT REVISION HISTORY:
 
+      2.30  (2024-05-31) avoid erroneous gcc warning
       2.29  (2023-05-xx) optimizations
       2.28  (2023-01-29) many error fixes, security errors, just tons of stuff
       2.27  (2021-07-11) document stbi_info better, 16-bit PNM support, bug fixes
@@ -5159,9 +5160,11 @@ static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp)
                // non-paletted with tRNS = constant alpha. if header-scanning, we can stop now.
                if (scan == STBI__SCAN_header) { ++s->img_n; return 1; }
                if (z->depth == 16) {
-                  for (k = 0; k < s->img_n; ++k) tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is
+                  for (k = 0; k < s->img_n && k < 3; ++k) // extra loop test to suppress false GCC warning
+                     tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is
                } else {
-                  for (k = 0; k < s->img_n; ++k) tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * stbi__depth_scale_table[z->depth]; // non 8-bit images will be larger
+                  for (k = 0; k < s->img_n && k < 3; ++k)
+                     tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * stbi__depth_scale_table[z->depth]; // non 8-bit images will be larger
                }
             }
             break;