assorted warning clean-ups for x86_64, etc (Mikko T.)

progs/samples/Makefile

@@ -45,3 +45,4 @@ readtex.o: readtex.c readtex.h
 clean:
 	-rm -f $(PROGS)
 	-rm -f *.o *~
+	-rm -f readtex.c readtex.h

progs/samples/blendxor.c

@@ -14,7 +14,9 @@
 #include <windows.h>
 #endif
 #define GL_GLEXT_LEGACY
+#define GL_GLEXT_PROTOTYPES
 #include <GL/glut.h>
+#include <GL/glext.h>
 
 
 GLenum doubleBuffer;

progs/samples/loadppm.c

@@ -37,7 +37,7 @@ static PPMImage *LoadPPM(const char *filename)
 	exit(1);
     }
 
-    if (fscanf(fp, "%d %d", &result->sizeX, &result->sizeY) != 2)
+    if (fscanf(fp, "%lu %lu", &result->sizeX, &result->sizeY) != 2)
     {
 	fprintf(stderr, "Error loading image `%s'\n", filename);
 	exit(1);