gleffects: Fix fisheye shader - pass float to sqrt

On OSX passing literal int to sqrt() in GLSL results in error.

https://bugzilla.gnome.org/show_bug.cgi?id=746209

diff --git a/ext/gl/effects/gstgleffectssources.c b/ext/gl/effects/gstgleffectssources.c
index 6a86701..e94fad8 100644 (file)
--- a/ext/gl/effects/gstgleffectssources.c
+++ b/ext/gl/effects/gstgleffectssources.c
@@ -192,7 +192,7 @@ const gchar *fisheye_fragment_source_opengl =
   "  vec2 normcoord;"
   "  normcoord = texturecoord - 0.5;"
   "  float r = length (normcoord);"
-  "  normcoord *= r * sqrt(2);"
+  "  normcoord *= r * sqrt(2.0);"
   "  texturecoord = normcoord + 0.5;"
   "  vec4 color = texture2D (tex, texturecoord);"
   "  gl_FragColor = color;"