Do not use argv[0] while parsing command line.

When using jwasm with `JWASM=/path/to/jwasm -h` argv[0] will be
replaced with JWASM variable value. It leads to incorrect behaviour on
NIX systems because `/` acts as a switch character while parsing
command line options.

main.c

@@ -103,7 +103,7 @@ int main( int argc, char **argv )
 #endif
 
     /* ParseCmdLine() returns NULL if no source file name has been found (anymore) */
-    while ( ParseCmdline( (const char **)argv, &numArgs ) ) {
+    while ( ParseCmdline( (const char **)&argv[1], &numArgs ) ) {
         numFiles++;
         write_logo();
 #if WILDCARDS