Less verbose output when building latex manual

cmake/UseLATEX.cmake

@@ -304,7 +304,7 @@ MACRO(LATEX_SETUP_VARIABLES)
   LATEX_WANTIT(PS2PDF_CONVERTER ps2pdf)
   LATEX_WANTIT(LATEX2HTML_CONVERTER latex2html)
 
-  SET(LATEX_COMPILER_FLAGS "-interaction=nonstopmode"
+  SET(LATEX_COMPILER_FLAGS "-interaction=batchmode"
     CACHE STRING "Flags passed to latex.")
   SET(PDFLATEX_COMPILER_FLAGS ${LATEX_COMPILER_FLAGS}
     CACHE STRING "Flags passed to pdflatex.")