* #6507 : do not crash if the program is not sflphoned

(tests have their own executable)

sflphone-common/src/audio/codecs/audiocodecfactory.cpp

@@ -193,15 +193,16 @@ std::vector<sfl::Codec*> AudioCodecFactory::scanCodecDirectory (void)
 
     std::string libDir = std::string (CODECS_DIR).append ("/");
     std::string homeDir = std::string (HOMEDIR)  + DIR_SEPARATOR_STR + "." + PROGDIR + "/";
-    std::string srcDir = std::string(get_program_dir()) + DIR_SEPARATOR_STR + "audio/codecs/";
+    const char *progDir = get_program_dir();
     // look for a CODECS_PATH environment variable...used in tests
     const char *envDir = getenv("CODECS_PATH");
     std::vector<std::string> dirToScan;
     dirToScan.push_back (homeDir);
     dirToScan.push_back (libDir);
-    dirToScan.push_back (srcDir);
     if (envDir)
         dirToScan.push_back(std::string(envDir) + DIR_SEPARATOR_STR);
+    if (progDir)
+        dirToScan.push_back(std::string(progDir) + DIR_SEPARATOR_STR + "audio/codecs/");
 
     for (i = 0 ; (unsigned int) i < dirToScan.size() ; i++) {
         std::string dirStr = dirToScan[i];

sflphone-common/src/fileutils.cpp

@@ -29,8 +29,9 @@
  */
 
 #include <libgen.h>
+#include <cstdlib>
 
-static char *program_dir;
+static char *program_dir = NULL;
 
 void set_program_dir(char *program_path)
 {