tests: fix leaks in test code

Ensure all images etc. are freed so that we can enable leak checking
across the tests and not get any false positives.

tests/gdimagefill/bug00002_2.c

@@ -45,6 +45,7 @@ int main()
 
 	/* Destroy it */
 	gdImageDestroy(im);
+	gdImageDestroy(tile);
 	return error;
 }
 

tests/gdimagefill/bug00002_3.c

@@ -51,6 +51,7 @@ int main()
 
 	/* Destroy it */
 	gdImageDestroy(im);
+	gdImageDestroy(tile);
 	return error;
 }
 

tests/gdimagefilter/gdCopyBlurred.c

@@ -110,6 +110,9 @@ void do_test()
     blurblank(im, 4, 0.0);
     blurblank(im, 8, 0.0);
     blurblank(im, 16, 0.0);
+
+    gdImageDestroy(im);
+    gdImageDestroy(imref);
 }/* do_test*/
 
 /* Ensure that RGB values are equal, then return r (which is therefore
@@ -185,6 +188,7 @@ void do_crosstest()
     gdTestAssert(getwhite(blurred, 1, LY + 1) <  getwhite(blurred, 1, LY + 3));
     gdTestAssert(getwhite(blurred, 1, LY + 3) <  getwhite(blurred, 1, HEIGHT-1));
 	gdImageDestroy(blurred);
+	gdImageDestroy(im);
 }/* do_crosstest*/
 
 

tests/gdimageline/gdimageline_aa_outofrange.c

@@ -15,5 +15,6 @@ int main()
 	gdImageLine(im, 1,1, 50, 50, gdAntiAliased);
 
 	/* Test for segfaults, if we reach this point, the test worked */
+	gdImageDestroy(im);
 	return 0;
 }

tests/gdinterpolatedscale/gdTrivialResize.c

@@ -51,6 +51,7 @@ void scaletest(int x, int y, int nx, int ny)
     gdTestAssert(gdMaxPixelDiff(imref, same) < CLOSE_ENOUGH);
 
     gdImageDestroy(im);
+    gdImageDestroy(imref);
     gdImageDestroy(tmp);
     gdImageDestroy(same);
 }/* scaletest*/
@@ -77,6 +78,7 @@ void do_test(int x, int y, int nx, int ny)
 
     gdImageDestroy(same);
     gdImageDestroy(im);
+    gdImageDestroy(imref);
 
     /* Scale horizontally, vertically and both. */
     scaletest(x, y, nx, y);

tests/jpeg/jpeg_read.c

@@ -40,6 +40,7 @@ int main()
 		return 1;
 	}
 
+	gdImageDestroy(im);
 	return 0;
 #endif
 }