molmol: change openmotif to motif and bump revision

* Refresh PNG patch
* Remove unneeded dependency on libXp
* Fix port linting nits

science/molmol/Portfile

@@ -5,7 +5,7 @@ PortGroup           compilers 1.0
 
 name                molmol
 version             2k.2.0
-revision            13
+revision            14
 categories          science chemistry
 maintainers         {gmail.com:howarth.at.macports @jwhowarth} openmaintainer
 description         Molecular graphics display program
@@ -16,7 +16,6 @@ long_description    MOLMOL is a molecular graphics program for displaying, analy
                     and Windows NT/95/98/2000 and is freely available. It does not work \
                     properly with RNA.
 homepage            http://www.mol.biol.ethz.ch/wuthrich/software/molmol/
-platforms           darwin
 license             Restrictive/Distributable
 master_sites        ftp://ftp.mol.biol.ethz.ch/software/MOLMOL/unix-gzip
 distfiles           molmol-${version}-src.tar.gz \
@@ -29,7 +28,7 @@ checksums           molmol-2k.2.0-src.tar.gz \
                     rmd160  08b3e21ab6eb7c9044e59373334181ff91ca8a53 \
                     sha256  07e1c3fd04ffe7c9e9d91eaefa0bf72e6d0913a981eec3bf0879bfc65537a6be \
                     size    1062297
-depends_lib         port:openmotif \
+depends_lib         port:motif \
                     port:mesa \
                     port:libGLU \
                     port:glw \

science/molmol/files/molmol-build.diff

@@ -57,7 +57,7 @@
 +
 +SYSLIB = -L/usr/lib -L@PREFIX@/lib \
 +         -lX11 -lXm -lGLU -lGL /System/Library/Frameworks/OpenGL.framework/Libraries/libGL.dylib @PREFIX@/lib/libGLw.dylib \
-+         -lXmu -lXt -lXp -lXpm -lX11 -lXext -lSM -lICE -lm -lc -lmx
++         -lXmu -lXt -lXpm -lX11 -lXext -lSM -lICE -lm -lc -lmx
 +
 +TOOLSDIR = $(TOP)/tools
 +SGDIR    = $(TOP)/sg

science/molmol/files/molmol-png.diff

@@ -1,7 +1,11 @@
---- src/motogl/MotOGLDump.c.orig	2012-05-10 19:56:16.000000000 -0400
-+++ src/motogl/MotOGLDump.c	2012-05-10 20:03:37.000000000 -0400
-@@ -248,7 +248,7 @@
- pngErrHand(png_structp pngStrucP, char *errMsg)
+--- src/motogl/MotOGLDump.c	2001-07-07 21:21:34.000000000 -0400
++++ src/motogl/MotOGLDump.c	2026-04-30 16:54:06.000000000 -0400
+@@ -245,10 +245,10 @@
+
+ #ifdef PNG_SUPPORT
+ static void
+-pngErrHand(png_structp pngStrucP, char *errMsg)
++pngErrHand(png_structp pngStrucP, const char *errMsg)
  {
    IORaiseError(errMsg);
 -  longjmp(pngStrucP->jmpbuf, 1);