fix some typos, add image test program

stb_image.c

@@ -3024,7 +3024,7 @@ static stbi_uc *bmp_load(stbi *s, int *x, int *y, int *comp, int req_comp)
                   mb = 0xffu <<  0;
                   ma = 0xffu << 24;
                   fake_a = 1; // @TODO: check for cases like alpha value is all 0 and switch it to 255
-                  STBI_UNUSED(fake_a);
+                  STBI_NOTUSED(fake_a);
                } else {
                   mr = 31u << 10;
                   mg = 31u <<  5;
@@ -3133,7 +3133,7 @@ static stbi_uc *bmp_load(stbi *s, int *x, int *y, int *comp, int req_comp)
             }
          } else {
             for (i=0; i < (int) s->img_x; ++i) {
-               stbi__uint32 v = (stbi_uint32) (bpp == 16 ? get16le(s) : get32le(s));
+               stbi__uint32 v = (stbi__uint32) (bpp == 16 ? get16le(s) : get32le(s));
                int a;
                out[z++] = (stbi__uint8) shiftsigned(v & mr, rshift, rcount);
                out[z++] = (stbi__uint8) shiftsigned(v & mg, gshift, gcount);

tests/stb.dsp

@@ -66,7 +66,7 @@ LINK32=link.exe
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
 # ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c
-# ADD CPP /nologo /MTd /W3 /GX /Zd /Od /I ".." /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /D "MAIN_TEST" /FR /FD /GZ /c
+# ADD CPP /nologo /MTd /W3 /GX /Zd /Od /I "..\.." /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /D "MAIN_TEST" /FR /FD /GZ /c
 # SUBTRACT CPP /YX
 # ADD BASE RSC /l 0x409 /d "_DEBUG"
 # ADD RSC /l 0x409 /d "_DEBUG"

tests/stb.dsw

@@ -3,6 +3,18 @@ Microsoft Developer Studio Workspace File, Format Version 6.00
 
 ###############################################################################
 
+Project: "image_test"=.\image_test\image_test.dsp - Package Owner=<4>
+
+Package=<5>
+{{{
+}}}
+
+Package=<4>
+{{{
+}}}
+
+###############################################################################
+
 Project: "stb"=.\stb.dsp - Package Owner=<4>
 
 Package=<5>

tests/stb_cpp.dsp

@@ -65,7 +65,7 @@ LINK32=link.exe
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
 # ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c
-# ADD CPP /nologo /MTd /W3 /GX /Zd /Od /I ".." /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c
+# ADD CPP /nologo /MTd /W3 /GX /Zd /Od /I "..\.." /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c
 # ADD BASE RSC /l 0x409 /d "_DEBUG"
 # ADD RSC /l 0x409 /d "_DEBUG"
 BSC32=bscmake.exe