Release program when returning from QOpenGLTextureBlitter::create()

Change-Id: I27b9496f9a58ceabc613372463543068cb432bdc
Fixes: QTBUG-60453
Reviewed-by: Johan Helsing <johan.helsing@qt.io>

src/gui/opengl/qopengltextureblitter.cpp

@@ -349,6 +349,9 @@ bool QOpenGLTextureBlitterPrivate::buildProgram(ProgramIndex idx, const char *vs
 
     p->glProgram->setUniformValue(p->swizzleUniformPos, false);
 
+    // minmize state left set after a create()
+    p->glProgram->release();
+
     return true;
 }