Fixed typo causing compilation error on iOS

Corrected inversion of skybox on OSX

--HG--
branch : nfb

KREngine/kraken/KRTextureTGA.cpp

@@ -77,7 +77,7 @@ bool KRTextureTGA::uploadTexture(GLenum target, int lod_max_dim, int &current_lo
     TGA_HEADER *pHeader = (TGA_HEADER *)m_pData->getStart();
     unsigned char *pData = (unsigned char *)pHeader + (long)pHeader->idlength + (long)pHeader->colourmaplength * (long)pHeader->colourmaptype + sizeof(TGA_HEADER);
 
-#if TARGET_OS_IPHONEz
+#if TARGET_OS_IPHONE
     GLenum base_internal_format = GL_BGRA;
 #else
     GLenum base_internal_format = pHeader->bitsperpixel == 24 ? GL_BGR : GL_BGRA;

KREngine/kraken_standard_assets_osx/Shaders/sky_box_osx.vsh

@@ -42,8 +42,8 @@ uniform mediump vec4 viewport;
 void main()
 {
 	gl_Position = vec4(vertex_position.xy, 1.0, 1.0);
-
+    
     vec4 t = inv_mvp_matrix_no_translate * vec4(vertex_position.xy, 1.0, 1.0);
-    t /= t.w;
+    t *= 1.0 / t.w;
     texCoord = vec3(t);
 }