GH-86 Fix default P4_CORE_PATH soas not to include the current

working directory, which should be added only by the user if
needed.  Fix p4FindFilePath() initial check for an absolute or
relative path.  Fix FILE-PATH to NUL terminate the empty path.
Fix makefile files to not include the current directory.

jni/makefile.in

@@ -26,7 +26,7 @@ bindir 		= @bindir@
 libdir 		= @libdir@/post4
 
 PROG		= ${top_srcdir}/src/post4$E
-POST4_PATH	= .:${top_srcdir}/src:${top_srcdir}/examples
+POST4_PATH	= ${top_srcdir}/examples:${top_srcdir}/src
 
 # Override from the command-line, eg. make DBG='-O0 -g'
 DBG		:= @DBG@

src/post4.c

@@ -144,9 +144,9 @@ p4FindFilePath(const char *path_list, size_t plen, const char *file, size_t flen
 	if ((str.string = calloc(1, PATH_MAX)) == NULL) {
 		goto error0;
 	}
-	/* Try the given file relative the current working directory. */
+	/* Try the given file directly. */
 	str.length = snprintf(str.string, PATH_MAX, "%.*s", (int)flen, file);
-	if (stat(str.string, &sb) == 0) {
+	if (strchr("./", *str.string) != NULL && stat(str.string, &sb) == 0) {
 		return str;
 	}
 	/* Path list supplied or use the default? */

src/post4.h

@@ -94,7 +94,7 @@ extern "C" {
 #endif
 
 #ifndef P4_CORE_PATH
-#define P4_CORE_PATH			".:/usr/pkg/lib/post4:/usr/local/lib/post4:/usr/lib/post4"
+#define P4_CORE_PATH			"/usr/local/lib/post4:/usr/pkg/lib/post4:/usr/lib/post4"
 #endif
 
 #ifndef P4_CORE_FILE

src/post4.p4

@@ -2013,7 +2013,7 @@ VARIABLE SCR
 256 CONSTANT path_max
 
 \ (S: <spaces>name -- )
-: file-path CREATE 0 , path_max ALLOT DOES> @+ ;
+: file-path CREATE 0 , 0 , path_max ALLOT DOES> @+ ;
 
 \ (S: sd.path xt -- )
 : set-file-path

test/makefile.in

@@ -33,7 +33,7 @@ LIBS		= @LIBS@
 
 PROG		= ${top_srcdir}/src/post4$E
 WORDS		= ${top_srcdir}/src/post4.p4
-POST4_PATH	= POST4_PATH='.:${top_srcdir}/src:${top_srcdir}/examples'
+POST4_PATH	= POST4_PATH='${top_srcdir}/examples:${top_srcdir}/src'
 
 BUILT		:= `date +'%a, %d %b %Y %H:%M:%S %z'`