Fixed various warnings

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@803 fdac6126-5c0c-442c-9429-916003d36597

src/OpenMesh/Tools/Utils/Gnuplot.hh

@@ -97,7 +97,7 @@ private:
   string           pstyle;
   vector<string>   to_delete;
   int              nplots;
-  bool             get_program_path(const string);
+  bool             get_program_path(const string& );
   bool             valid;
 
   // Name of executed GNUPlot file

src/OpenMesh/Tools/Utils/conio.cc

@@ -112,7 +112,7 @@ int kbhit(void)
 
 int getch(void)
 {
-  char ch;
+  char ch = ' ';
   int error;
   static struct termios Otty, Ntty;
   
@@ -149,7 +149,7 @@ int getch(void)
 
 int getche(void)
 {
-  char ch;
+  char ch = ' ';
   int error;
   static struct termios Otty, Ntty;