added glUniform1i_func
diff --git a/progs/util/extfuncs.h b/progs/util/extfuncs.h
index 97f7f7d..339dbbd 100644
--- a/progs/util/extfuncs.h
+++ b/progs/util/extfuncs.h
@@ -22,8 +22,9 @@
 static PFNGLISSHADERPROC glIsShader_func = NULL;
 static PFNGLLINKPROGRAMPROC glLinkProgram_func = NULL;
 static PFNGLSHADERSOURCEPROC glShaderSource_func = NULL;
+static PFNGLUNIFORM1IPROC glUniform1i_func = NULL;
 static PFNGLUNIFORM3FVPROC glUniform3fv_func = NULL;
-static PFNGLUNIFORM3FVPROC glUniform4fv_func = NULL;
+static PFNGLUNIFORM4FVPROC glUniform4fv_func = NULL;
 static PFNGLUNIFORMMATRIX2FVPROC glUniformMatrix2fv_func = NULL;
 static PFNGLUNIFORMMATRIX3FVPROC glUniformMatrix3fv_func = NULL;
 static PFNGLUNIFORMMATRIX4FVPROC glUniformMatrix4fv_func = NULL;
@@ -70,6 +71,7 @@
    glIsShader_func = (PFNGLISSHADERPROC) glutGetProcAddress("glIsShader");
    glLinkProgram_func = (PFNGLLINKPROGRAMPROC) glutGetProcAddress("glLinkProgram");
    glShaderSource_func = (PFNGLSHADERSOURCEPROC) glutGetProcAddress("glShaderSource");
+   glUniform1i_func = (PFNGLUNIFORM1IPROC) glutGetProcAddress("glUniform1i");
    glUniform3fv_func = (PFNGLUNIFORM3FVPROC) glutGetProcAddress("glUniform3fv");
    glUniform4fv_func = (PFNGLUNIFORM3FVPROC) glutGetProcAddress("glUniform4fv");
    glUniformMatrix2fv_func = (PFNGLUNIFORMMATRIX2FVPROC) glutGetProcAddress("glUniformMatrix2fv");