mozilla: fix stop condition of a for iteration

When second argument of a for statement is a sequence,
firsts expressions are evaluated as void with no usage
of their return value.
Signed-off-by: Rémi Duraffort <ivoire@videolan.org>
(cherry picked from commit 16bc4dd9)
Signed-off-by: Rémi Duraffort <ivoire@videolan.org>

projects/mozilla/vlcplugin.cpp

@@ -133,7 +133,7 @@ NPError VlcPlugin::init(int argc, char* const argn[], char* const argv[])
     const char *progid = NULL;
 
     /* parse plugin arguments */
-    for( int i = 0; i < argc , ppsz_argc < 32; i++ )
+    for( int i = 0; (i < argc) && (ppsz_argc < 32); i++ )
     {
        /* fprintf(stderr, "argn=%s, argv=%s\n", argn[i], argv[i]); */