add unproject function

src/project.c

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c), Recep Aslantas.
+ *
+ * MIT License (MIT), http://opensource.org/licenses/MIT
+ * Full license can be found in the LICENSE file
+ */
+
+#include "../include/cglm/cglm.h"
+#include "../include/cglm/call.h"
+
+CGLM_EXPORT
+void
+glmc_unprojecti(mat4 invMat, vec4 vp, vec3 coord, vec3 dest) {
+  glm_unprojecti(invMat, vp, coord, dest);
+}
+
+CGLM_EXPORT
+void
+glmc_unproject(mat4 m, vec2 vp, vec3 coord, vec3 dest) {
+  glm_unproject(m, vp, coord, dest);
+}