Fix #6872: correctly support the math command \dddot

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/branches/BRANCH_1_6_X@35237 a592a061-630c-0410-9148-cb99ea01b6c8

development/scons/scons_manifest.py

@@ -1591,6 +1591,7 @@ lib_images_math_files = Split('''
     dashv.png
     ddagger.png
     ddot.png
+    dddot.png
     ddots.png
     delim.png
     delta.png

lib/Makefile.am

@@ -543,6 +543,7 @@ dist_imagesmath_DATA = \
 	images/math/dashv.png \
 	images/math/ddagger.png \
 	images/math/ddot.png \
+	images/math/dddot.png \
 	images/math/ddots.png \
 	images/math/delta.png \
 	images/math/delta2.png \

lib/symbols

@@ -7,7 +7,7 @@ acute               decoration none
 bar                 decoration none
 breve               decoration none
 check               decoration none
-dddot               decoration none
+dddot               decoration none       amsmath
 ddot                decoration none
 dot                 decoration none
 grave               decoration none

lib/ui/stdtoolbars.inc

@@ -366,6 +366,7 @@ ToolbarSet
 		Item "vec" "math-insert \vec"
 		Item "acute" "math-insert \acute"
 		Item "ddot" "math-insert \ddot"
+		Item "dddot" "math-insert \dddot"
 		Item "breve" "math-insert \breve"
 		Item "overline" "math-insert \overline"
 		Item "overbrace" "math-insert \overbrace"

src/mathed/InsetMathDecoration.cpp

@@ -176,9 +176,8 @@ void InsetMathDecoration::infoize(odocstream & os) const
 
 void InsetMathDecoration::validate(LaTeXFeatures & features) const
 {
-	if (ams())
-		features.require("amsmath");
-	InsetMathNest::validate(features);
+	if (!key_->requires.empty())
+		features.require(to_utf8(key_->requires));
 }
 
 

status.16x

@@ -77,6 +77,9 @@ What's new
 
 - Fix the output of glyph 0x02e0 (MODIFIER LETTER SMALL GAMMA) (bug 6817).
 
+- Load the amsmath LaTeX-package when the math command \dddot is used to
+  avoid LaTeX errors (bug 6872).
+
 - Small tweaks for the memoir text class.