Manual: document "exec" for checkstyle and scalastyle.

doc/syntastic-checkers.txt

@@ -3186,6 +3186,9 @@ Maintainer:  Dmitry Geurkov <d.geurkov@gmail.com>
 
     http://checkstyle.sourceforge.net/
 
+You need a working installation of Java Runtime Environment to run
+"Checkstyle".
+
 Checker options~
 
 This checker is initialised using the "makeprgBuild()" function and thus it
@@ -3204,6 +3207,10 @@ Default: "sun_checks.xml"
 Path to the configuration file for the "-c" option (cf.
 http://checkstyle.sourceforge.net/cmdline.html#Command_line_usage).
 
+                                          *'g:syntastic_java_checkstyle_exec'*
+Type: string
+Default: "java"
+Path to the "java" executable.
 
 Notes~
 
@@ -5976,6 +5983,9 @@ Syntastic uses the command line version of "Scalastyle":
 
     http://www.scalastyle.org/command-line.html
 
+You need a working installation of Java Runtime Environment to run
+"Scalastyle".
+
 Checker options~
 
 This checker is initialised using the "makeprgBuild()" function and thus it
@@ -5995,6 +6005,11 @@ Default: "scalastyle_config.xml"
 Path to the configuration file to use. You might want to also set this to a
 full path.
 
+                                         *'g:syntastic_scala_scalastyle_exec'*
+Type: string
+Default: "java"
+Path to the "java" executable.
+
 ==============================================================================
 SYNTAX CHECKERS FOR SCSS                             *syntastic-checkers-scss*
 

plugin/syntastic.vim

@@ -19,7 +19,7 @@ if has('reltime')
     lockvar! g:_SYNTASTIC_START
 endif
 
-let g:_SYNTASTIC_VERSION = '3.8.0-87'
+let g:_SYNTASTIC_VERSION = '3.8.0-88'
 lockvar g:_SYNTASTIC_VERSION
 
 " Sanity checks {{{1