CodeQL File{MayNot,Never}BeClosed.ql file-handle resource leaks

Guided by CodeQL static code analyser.

FileMayNotBeClosed.ql
FileMayNeverBeClosed.ql

The trick with "if(fp != stdout)" is problematic (to analyser) as
technically 'stdout' can be a global pointer that COULD be modified any
time, so it might have changed between the fopen() and fclose() calls so
the close MAY NEVER occurs (which is problem the analyzer can see).

So local state is maintained as a bool which will also clarify to the
compiler see the intention without concern for external stdout
modification.

Some items appear to be out and out leaks when certain commands are use.

graphics/grCMap.c

@@ -122,7 +122,6 @@ char *path;			/* a search path */
 char *libPath;			/* a library search path */
 
 {
-    FILE *f;
     int max, red, green, blue, newmax, argc, i;
     colorEntry *ce;
     char fullName[256], inputLine[128], colorName[100];
@@ -135,7 +134,7 @@ char *libPath;			/* a library search path */
     (void) sprintf(fullName, "%.80s.%.80s.%.80s", techStyle,
 	    dispType, monType);
 
-    f = PaOpen(fullName, "r", ".cmap", path, libPath, (char **) NULL);
+    FILE *f = PaOpen(fullName, "r", ".cmap", path, libPath, (char **) NULL);
     if (f == NULL)
     {
 	/* Check for original ".cmap1" file (prior to magic v. 7.2.27) */
@@ -163,7 +162,7 @@ char *libPath;			/* a library search path */
 
 	    TxError("Syntax error in color map file \"%s.cmap\"\n", fullName);
 	    TxError("Last color read was index %d\n", max);
-	    return FALSE;
+	    goto cleanup;
 	}
 	else
 	{
@@ -219,6 +218,11 @@ char *libPath;			/* a library search path */
 
     GrSetCMap();
     return TRUE;
+
+cleanup:
+    if(f)
+	fclose(f);
+    return FALSE;
 }